Summary: I am so happy with this SSD. I used a 120GB OCZ Agility 3 as the primary/boot drive in my 17" Dell XPS for about 15 months. It was OK but the computer would crash (BSOD and/or rebook) about once every 2 weeks. Not often enough to make it a big deal but still a bit annoying and hard to pinpoint the exact reason. Tried to update all drivers and firmware without any luck. Now, I replaced the 120GB OCZ Agility 3 with a 512 Crucial M4 and I couldn't be happier.