Pros: User interface well designed and intuitive. Brought up cold with 4 new disks, worked perfectly. Pros too many to mention, happy with performance, extremely well designed. I'm using RAID5, was trivial to set up. I like being able to ssh to the unit and work directly with the operating system.

Cons: For me the administrative interface is too fancy, gaudy with all the cute little icons. Please try to make it look more professional. Yes, that's my only silly "con" LoL

Overall Review: I hope I can put larger disks in it

Pros: Easy to use. Management interface is straight forward and simple to understand. Quiet, runs cool. Alerts you when (and which) drive fails. Quick setup. Supports port trunking (Round Robin, fail over, balance XOR, etc.) UPS support for unattended shutdown (see website for compatible devices) Everything else. You won't be disappointed.

Cons: None. Both have performed flawlessly.

Overall Review: I would not recommend using Western Digital WD20EARS drives. I had 6 of 12 drives fail within 30 minutes. Spend a little more and get a real 7,200 RPM drive. I have two of these on my home network, both are populated with (4) 2 terabyte drives from Samsung. The second NAS is a mirror of the first. Replication was very easy to set up between the two and every night the second NAS gets and incremental copy of the first. I would love to see a VFD display in future Qnap devices, but that would drive the cost up just a bit more.

Pros: see my first post. Still going strong and remains super quiet.

Cons: Cost.

Overall Review: Last night I was working on moving files to the NAS. The noise got a bit louder than what it was when it first started doing it. This drove me nuts. This is what I found: I shut the server down and removed the drives in order to take a look inside. As you look inside the box, you will see some wires that connect the LCD display and the motherboard. This was the culprit. What I did was get a couple of zip ties and tied them down to the frame where the drives mount. NO MORE NOISE !!!!!!! I am very happy with this unit. I will eventually upgrade to the 800 series unless 2TB drives get cheaper. I am anxiously awaiting for the 3TB drives to become cheaper and for QNAP to release a firmware update. They said they are currently in testing for such thing. Hope this helps with your decision to get one. Later dudes.

Pros: Fast, compact, light, easy to configure even for a non network user. Included easy setup guide. Everything is included except the drives.

Cons: It can be a bit loud if you set this unit next to your computer. Mine sits next to my iMac on my desk in my home office. I've gotten used to the sound of the 7200 rpm drives. Occasionally, the harmonics caused by the drives spinning will make the unit's enclousure make a light buzz sound. As I write this, it is not doing that but I think as it gets a bit warm, the metal expands and therefore you get such light buzz. This should not deter you from getting the unit. I placed a desktop lamp on top of it and it not longer does it. Unless you have a server room in your house, then you will not care for this. I plan to move mine onto one of my bookshelves later. Otherwise, this is very minor and should not have any weight on your decision to buy this great unit.

Overall Review: I have mine setup with four drives totaling 4.5 TB on a RAID 5 configuration. It took me about 1 to 1.5 hours to setup everything and that was even with me writing down my chosen settings. The RAID configuration took about 15-20 minutes for it to tell me it was ready. I t was easy to find under my iMac. However, under Windows XP/Vista on my laptops made required a bit more finagling to set up things, but they are running smooth. The video capabilities are fine as long as you don't over task the NAS.

Pros: Easy deployment, using in an environment with macs and pcs, more than 50 computers attached, each with its own mapped drive and backup setup. Web software is very easy to use, and setting it up as an FTP server was extremely easy and is super easy for the end-user to use. It has its own file management page built in, where users can login with their custom user name and password with no need to download special ftp client software. It does everything you need it to do, at an extremely low price compared to other products that offer this kind of versatility! I also love that this NAS can be used as a Time Machine drive for Macs. And with quota management options, you can ensure that one user doesn't take all the space on the drive. I could go on and on. Just buy it :)

Cons: A little weird with mapped drives - sometimes it drops the authentication on the client machine and the drive has to be clicked on before programs that rely on that connection can use it. It doesn't forget the username and password, but rather just doesn't realize it's connected until the user actually opens up My Computer and double clicks on the drive. Then, whatever programs rely on it can do their thing. Weirdest thing, but definitely not a deal-breaker, considering the price!

Pros: RAID5 works flawlessly. Great QNAP online support forum. I use this with 4 x 2TB Samsung HDs, use the web server and the Twonky media server.

Cons: Firmware is sometimes a bit buggy, but the QNAP support usually iron things out. The UPS support currently doesn't work as designed.

Pros: Great form factor, compact, well made and classy. Real easy to put disks in and take them out. It does NAS but it can also act as a web server, UPnp media station, torrent downloader, IP camera backup, rsync server, and a whole bunch of other things via the QKPG packaging system. The firmware updates are frequent and so new features are added. I messed around with Freenas and Unraid but it really wasn't worth the trouble - this is far superior and has much lower power consumption.

Cons: Be careful about the drives you select, some common WD drives dont play well. This model has the Marvell/ARM processor and it's a bit marginal from a performance perspective. It's also not compatible with some of the add-in software, e.g., can't transcode.

Overall Review: These are really mini servers. However, I would probably stretch for an atom based model if I was going to use it for non-NAS features or if I wanted high performance.

Pros: Fast, Quiet, Cool, Easy Web interface

Cons: Rattles a little with older louder drives, took almost 24hours to sync my 2TB raid 1.

Overall Review: I have cacti running on it monitoring the network, free space and free ram. i have 2x 2TB F4 samsung 3 platter drives in here working great, they're not on the approved list yet but should be soon highly recommended. i'll soon put 2 more in for a 6TB raid 5.