DIYPC V3Plus-B Black Aluminum Mini-ITX Tower Computer Case

Pros: 1) very compact, but interior space is well used. Plenty of room for a solid CPU cooler that will keep a powerful CPU running cool and quiet. With an ATX power supply you have about 80mm of clearance for a CPU cooler.
2) Expansion slots are quite nice, allowing for a dual-slot GPU up to 185mm in length. Enough room for most any mid-range GPU such as Nvidia's GTX 650 or GTX 660, in fact ASUS has a dual slot GTX 670 that is only 170mm in length. So you can pack a LOT of performance into this little box.
3) Very sleek design that easily blends with or compliments it's surroundings. I use one as the basis of my HTPC and it sits in the cabinet and easily matches with my Denon receiver and other devices.
4) decent storage options with 1x 2.5in bay ideally for an SSD and a second bay that holds either a 3.5 or 2.5in drive. So you could have a decent SSD for your boot drive and main apps, and drop in a 4tb mechanical for all your mass storage.

Cons: 1) No optical drive bay. This may not be an issue for most people but being able to put a DVD/Bluray drive in here would be nice for an HTPC setup, allowing quick access to movies before you find time to rip them.
2) USB 3.0 provided by a full USB 3 header, rather than the pass-through design of some cases. My board has no USB 3.0 header on the motherboard, only USB 3.0 slots on the back. An adapter to connect that cable to a rear port is often included with some cases, but missing here. So this is only a con if your board has no 3.0 header on the motherboard.

Other Thoughts: I use this case in an HTPC build, paired with an Intel Pentium G2120 (ivy bridge based 3.1ghz, dual core, 3mb cache, 55w TDP), MSI HD 6450, ASUS P8H61-I mini itx board, 8gb corsair DDR3 1600, and a spare Intel 40gb SSD. I chose not to use an ATX power supply and instead used a PicoPSU which easily powers the system, and allows me to use a very tall CPU cooler and mount an additional fan. Doing so keeps everything very cool and very quiet.
Lian Li has a good alternative to this case in the PC-Q07, but while that case is roughly the same size, it allows for an optical drive, but you lose out on the dual-slot GPU option and limits you to 1x drive bay for either a 3.5 or 2.5in drive. Prices are pretty similar, you just choose what you want to trade off in terms of expansion. This truly is a wonderful case, and offers potential to create any number of systems types, from a portable powerhouse, to a simple HTPC, or a decent NAS type server by using twin 2.5 inch 2TB drives.

Pros: All-metal case
Easy setup with disassembled case

Cons: Very tight fit inside (of course) with little guidance as to CPU cooler height limitation.
Lacks top ventilation which would dramatically aid airflow.

Other Thoughts: I love the look and small-ness of this case. I would not recommend it for any application that needs a graphics card that requires a fan, but for what it is, it works perfectly.

I built a small print server from an old mini-ITX board with LGA 775 chip. It stays quiet and out of the way and allows for much easier printer sharing.

If cooling is an issue for you, if you can spare the extra 3.5" hard drive spot, there are some hard drive coolers which can mount in the same space (make sure the cooler mounts on the four holes on the underside of the hard drive) which can draw in air from the ventilation on the bottom of the case. For example:

http://www.newegg.com/Product/Product.aspx?Item=N82E16835119063

It will make it a little louder, but if you can find a HDD cooler with a larger fan, it isn't so much of an issue.

Pros: Pros: easy fit, standard atx power supply, no cd/dvd rom (great for dedicated firwall or dvr).

Cons: Frame is a little loose and can not be tightened (atleast the one I got), but who's gonna shake their computer.

Other Thoughts: Great price, and nice design

Pros: Small, an can fit a zotic GTX 660 (NOTE: has to be a zotac, its a small gpu)

Cons: 1.you NEED a modular PSU. i dont have one and it gets in the way.
2. airflow. you will half to do some testing to get the airflow decent. I might drill a hole in the front to put a fan in.

Pros: 1. Small form factor that fits alot of standard sized components.
2. The specs says ITX only but some mATX motherboards fits just fine.
3. Fits full sized ATX PSU.
4. Has 2 full sized expansion slots for Graphics Cards or others.
5. Full Aluminum casing.
6. Simple bushed aluminum design.
7. USB 3.0

Cons: 1. Not all mATX motherboard fits.
2. Because of the small form factor it heats up but as long as its not overclocked then its fine.
3. Does not fit large sized Graphics Cards.

Other Thoughts: I've been looking for a small form factor casing for quite awhile now and I found the perfect one and this was it.

Current Rig:
AMD A10-5800k 3.8Ghz with Radeon HD 7660D
MSI FM2-A55M-F33 mATX with HDMI
2 x 4GB DDR3 1333 = 8GB

This is labeled as ITX but looking at the measurement I knew I could fit a mATX motherboard and I was right. I ended up buying the MSI FM2-A55M-E33 and it fits perfectly. You won't be able to fit a 3.5 HDD though but you can still fit a standard 2.5 Laptop HDD or SSD. You might want to put an SSD so its boots up faster. I have a 64gb SSD installed with Windows 8 64-bit and it boots in literally 7 seconds. Since its a small form factor, it gets hotter then usual but as long as your overclocking then your fine. I've been using it for more then a month now and it works fine. At normal usage with photo editing software and watching movies and playing music while surfing the web like youtube and facebook I got temperatures of between 20 degrees to 40 degrees Celcius. I've installed Steam as well and in gaming like Crysis 2 and Borderlands 2 the temperature goes up to 45 to 65 degrees Celcius. Out of everything I've installed inside this tiny case there is still room for a full size Graphics Card for CrossFire Dual-Graphics compatibility. So imagine a full on Gaming Rig in a small form factor casing. You can't do that to other ITX casing out in the market.

I really love this casing and am very satisfied of my purchase. But it is limited because you won't be able to do the other stuff that you can do in normal casings like overclocking because of the limited space for better heatsinks and RAID because of the limited space for HDDs. Other then that, overall its been a good purchase for me.

Pros: Very light weight and very clean design
Great for stream box/server

Cons: Not enough air flow in the case and no cable management
Case not long enough to place a full size graphics card

Other Thoughts: This case is great for setting up a stream box or server, and is not the best set up for gaming.

Pros: Good price
Good looking case
very small

Cons: Component arrangement
thermal performance

Other Thoughts: This is a nice looking case for a good price. You'll be hard pressed to find a smaller mitx case that accepts a discrete video card. Just don't put highend components in it and expect tempatures to be acceptible because they wont be.

Pros: Beautiful Clean Design, Material, Fit and finish, mini-itx take Full ATX powersupply.

Cons: Perhaps, Newegg will import the V2 version or the V3 with different color? I found this is manufactured by Jonsbo.com that Newegg intended to hide?

Other Thoughts: Why I didn't choose Lian Li?
1. This one has no optical drive cut out, makes very clean in design.
2. There is no manufacture name on the front and rounded corner that looks like part of my home entertainment and sound system. ( looks very luxurious. )
3. Smaller foot print than Lian Li.
4. You can mount the ATX power either way.

Bare in mind, this case is not design for your regular desktop system with neon light, neon fan, and LED disco ball. It is also NOT design to use with your super duper gaming rig. It is mainly for those who like to use this in their living room for movie, photo and music, connecting Skype Webcam, Logitech Dinovo mini on their coffee table.

Pros: Small
Fully Aluminum with sufficiently soft feel
Rubber padded HDD mounts
Side and bottom panels come off
Light
Vents at bottom of case as well
ATX size PSU mount
Price

Cons: Integrated standoffs seem flimsy
No fan or even a spot to put a reasonably sized fan
Aluminum got slightly warped during build, not major.
Power button feels cheap
Could use removable motherboard tray/panel

Other Thoughts: Will not fit PSU longer than OCZ StealthXStream

Plug PSU and front panel connectors before installing PSU

Fits CM GeminII M4, no taller or else the fan would be intaking no air due to the PSU blocking airflow.

Specs:
Xeon E3 1245V2
Gigabyte GA H77N WiFi
OCZ 700W
CM GeminII M4
Mushkin Chronos 120GB
16GB Corsair XMS3

Pros: I was waiting for Lian-Li Q11b to come back for a while but this one looks just like it! And the volume of this one is 20% less than Q11b. This might be handy if it can hold GTX 650 or HD 7770. This range covers a lot of gamers like me.

Cons: No front external odd bay but not many people wants it these days anyway.