Pros: Put in a Lenovo to upgrade existing samsung drive. No problems.

Cons: None

Pros: this is fast and small ssd

Cons: MAJOR PROBLEMS
my bios suddenly doesnt detect it at all it worked fine for like 25d and one morning bam no ssd some bios uefi thing and no ssd did everything i can reput it into slot cleard cmos reset bios to deflouts no luck although i didnt need to configure anything in order to make it work stick it and works but now im pretty sure it failed

other issue after longer period of time left in sleep mode drive wanishes and restart doesnt help than you have to power off pc completely to make it work again

im really dissapointed because i didnt expect it to work 20d even the most cheap kingston 128gb ssd bought over a year ago still works with sata interface

Other Thoughts: it comes in green pcb and on black pcb doesnt look good

Pros: Crazy fast
Eazy to install

Cons: Nothing yet!

Other Thoughts: I build a new machine with a ASRock Extreme 4 board and I didn't have to do a thing for drive to work. Put on on the board, booted up and installed windows. Checked performance it its just nuts. I did not have to diable anything or do any bios updates or anything. Runs like a champ. Should have purchased the 512 though....oh well.

Pros: This new drive form factor is an in expensive alternative to a traditional SSD and is very fast

Cons: There is a serious Driver issue that requires a fix outlined below.
After trying to get Gigabyte support to resolve, I spoke with support at Crucial and found they really had no clue as to why this was happening. During the discussion, they provided a few links to suggest fixes ranging from adjusting the HIPM & DIPM to tweaking the registry.
Working through these I found what the ROOT CAUSE is and how to fix the problem. Here is a summary of the cause and how to fix.
The real issue is the Intel SATA Chipset requires and iaStor drivers. The iaStor drivers were changed a few revs back to include Load Protection Modules (LPM) where the drivers try to manage faults in low loads at the Power Supply Unit (PSU) level. This change introduced a flaw in how the PSU handles power to SSD and Spindle drives to prevent too low of power being fed to these devices. The change did not take into account the M.2 format.
A Traditional SSD has a slow bleed capacitor to maintain its operation and the normal mechanical drive can simply shut down without issue. The M.2 format does not appear to have the SSD slow bleed capacitor and therein is the problem.
The iaStor driver’s simply cut power at the PSU under LPM, which causes the M.2 format drive to simply disappear in BIOS, thus the need to power down the PSU to rediscover the M.2 drive. This may be Crucial or in my case Gigabyte issue but I suspect it’s the iaStor driver only since this is happening across a wide range of motherboards and may be happening with other M.2 manufacturers as well.

Let’s hope the manufacturers get this information and adjust as needed so we don’t have to perform manual adjustments going forward.

Other Thoughts: THE FIX:
Through trial and error, the issue is really very simple. The LPM in the iaStor drivers must be turned off since it is on by default. The registry entries for this don't exist for the LPM as installed by the driver. Manual registry entries are needed to turn off LPM for the specific iaStor ports supporting the M.2 drive are required to fix this problem. You won’t want to shut off all LPM ports since they are needed for the other drive form factors to function properly
Each motherboard or iaStor driver may setup its own registry entries. The default single or fresh install should be [HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\iaStor\Parameters]. However, my current installation has three variants (same location) iaStorA, iaStorF and iaStorV. Locate the one that includes the ‘Device’ Key and use the path in building your registry dword strings shown below replacing the "iaStor" as needed. Remember only include the ports associated with the M.2 drive, if you want to include them and have the LPM mode enable, change the dword value to “dword:00000001”.
I copied and pasted only Port 4 & 5 in to a text file named ‘LPM.reg’, for my Gigabyte MB since those are the ports supporting the M.2 drive. Once you have the file created, double click on it to load the registry entries via RegEdit. If the path is good, you will see a message the keys were successfully loaded. If the path is not valid, an error message will ask if you what to create them – say no and correct the path in the file.

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\iaStor\Parameters\Port0]
"LPM"=dword:00000000
"LPMDSTATE"=dword:00000000
"DIPM"=dword:00000000

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\iaStor\Parameters\Port1]
"LPM"=dword:00000000
"LPMDSTATE"=dword:00000000
"DIPM"=dword:00000000

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\iaStor\Parameters\Port2]
"LPM"=dword:00000000
"LPMDSTATE"=dword:00000000
"DIPM"=dword:00000000

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\iaStor\Parameters\Port3]
"LPM"=dword:00000000
"LPMDSTATE"=dword:00000000
"DIPM"=dword:00000000

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\iaStor\Parameters\Port4]
"LPM"=dword:00000000
"LPMDSTATE"=dword:00000000
"DIPM"=dword:00000000


[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\iaStor\Parameters\Port5]
"LPM"=dword:00000000
"LPMDSTATE"=dword:00000000
"DIPM"=dword:00000000

Pros: Super fast, easy to install. Boots almost immediately.

Cons: None

Other Thoughts: Quit looking and just buy it!

Pros: I'm not going to ding the adapter for a mistake I made. I'm sure it's a fine SSD but make sure you read your motherboards specs before buying.

Cons: M.2 SSD drive interfaces come in 2 basic styles -- the more common SATA and the lessor but often faster PCIe. I ordered this for my new HP 800 G1 Mini. When I booted and found that the SSD was not recognized -- that's when I looked closer and realized that not all 22x80mm cards are alike -- this is a SATA SSD and the M.2 SSD interface in my HP is PCIe. I need something like the Plexor M6e M.2 SSD (PX-G256M6e).

Pros: Problem-free installation. Comparable performance to other SSDs that I've used.

Cons: None

Other Thoughts: Installed in an Asus Z97I-Plus with version 2103 BIOS.

Pros: I want to update my last review. The drive is doing a lot better now. Windows 7 will load and 8.1 boots faster now. Overall progress is better. Maybe it was just me.

Cons: None

Other Thoughts: It does work on ASRock's Fatal1ty 990FX Killer board. You will need however to disable the IDE and Sata Combined Mode to have better performance which I did not do the first time around. It does not seemed faster than my OCZ Vector 150 ssd drive.

Pros: Well everything was detected by the bios and Windows 8. I did upgrade the bios from ASRock's web site before I installed it.

Cons: It seems to be really slow in booting up. Once it boots up it seems to be somewhat okay. If I restart again it takes forever. Maybe there's something I haven't done yet to make it work right. Been checking, so not sure what it is.
Couldn't get Windows 7 to install on it. It just sat there.

Other Thoughts: I have a Fatal1ty 990FX Killer Motherboard
32 GB GSkill memory
Any help to make it boot and work better would be awesome.+
Will do an update later.