I put 2 new M500 960G drives in 2 separate MPBs one an early 2011 17", the other a late 2011 15".
I experience a lot of identifiable issues that I can attribute directly to the M500.
I run Parallels 9 and spend the majority of my time on the PC side in Office 2010. Every time I save a file in any of the Office products, I get the dialog window for saving, but the areas where the Filename is located doesn't refresh for a long time. Most of the time it's a minimum of 10 seconds, more often it's 20-30 seconds. During that time I get a couple window redraws, and usually the message in the title bar "<name of application> is not responding". If I'm patient, It finally draws the filename area and lets me save the file.
I've been a techie for 30+ years. This looks to me like a drive timeout. It appears that when you get ready to save something on the windows side, the SSD has to flush it's entire cache before it can "find" a place to save the file. One possibility. Another would be that it simply takes a long time for it to allocate new space for a file. Obviously, there are others.
This is a 3G transfer rate drive. I've got it in the main bay of my MBP, which is a 6G capable SATA interface. That may also be causing some of the issue. I know that putting a 6G transfer rate drive in the optical bay guarantees failure, even if the specs say it will autoswitch to 3G.
So, Yes, there are problems.
Interestingly enough, I have not had the same type of problems on the Mac side of the machine, even in Office 2011.
And - it's so nice to have enough room on one drive!
I've also got a 1T in the optical bay for extra things. It's a 3G SATA interface, to it's working well too.
Lastly, I updated the firmware on the drive in the 15" MBP, and the pause-during-save went away. I'm going to try it on the 17", but I don't have an internal drive in it, so I'll have to move it to the 15" machine to do the update.
And, An FYI - There appears to be no way to create a bootable USB for the firmware upgrade on the mac. Several days of frustration and a call to Micron verified it. Internal CD is the only guaranteed way to update it. (or put it in a PC to do the update.)