Summary: You can read up on this elsewhere on the Internet and you'll find that many people have had issues with the M4s - apparently its predecessor the M3 was reasonably reliable but the M4 is frequently short lived. That was my experience.
I've used a lot of these and only had 1 fail so far
Eric T, Amazon
18 December 2013
Summary: I've used a LOT of these in Asterisk/voiSip phone systems. They get a serious workout since they run 24/7 as server drives. All of them have been great, except for one that failed after about a week. So I'm taking off 1 star for that. The performance isn't the fastest. I really like SSD drives from Intel and OCZ for situations where I need utmost speed. But for basic systems, these perform soooo much faster than traditional hard drives. It is crazy.
Summary: I ordered this for use in my Intel NUC which is running OpenELEC. I have had zero problems with it. It works great, and is fast. I haven't done any benchmarking or comparisons, because frankly I don't really care. It works perfectly for my needs, and should work great for any other average use.
It's got some up's and down's.. The down's are much better then the up's.
11 November 2013
Summary: Fast reads in the 270's but writes are painfully slow around 55MB/s. I bought this to use with Intel Smart Start technology. It works fine for startup, but if you generally wait for your machine to finish powering down before walking away, you will rack up some significant idle time.
Summary: Solid state drives fits within my Intel Nuc. It has been running without any issues. Only downside is that it is pricey for the storage one gets but at this small size, it's to be expected. I would recommend for anyone with an Intel Nuc.
Summary: 10-07-13: I installed one of these in an HP DV6-7014nr laptop to run as a fast cache with Intel Rapid Store. It had been working nicely for about 6 months. Yesterday, it suddenly was reported dead by the Rapid Store. I rebooted and reset the cache and all was fine until I started an HP scheduled BIOS upgrade. The Upgrade process got to the reboot phase and the laptop never came back to life.
Summary: Curcial makes great memory and this just goes to prove it. Dell Latitude M6600 16GB RAM 256 GB Solid State Samsung Drive Crucial m4 32GB mSATA Internal Solid State Drive for Cache WD 1TB for Storage. My system ROCKS.