I give only four stars, because it's a little bit unstable: the disk freezes occasionally and has given me one BSOD. I have spent a lot of time in the OCZ Forum trying to find answers to my questions, some problems have been solved, some don't. The most annoying problem has been freezing, so I tell you now: disable hibernation right away and enable (in BIOS) hot swap/hot plug to all disk ports you have, thus you avoid many swetty situations trying to figure out what's freezing the disk. Also update your firmware immediately (instructions on the OCZ Forum). I've tried to update mine but I haven't succeeded yet; the instructions won't apply in my computer and I can't figure out why not. But still, Vertex3 is a disk of my dreams: The Atto benchmark result: read 557MB/s, write 527MB/s.
Edit: After many many firmware updates it works just fine, and I can recommend it for anyone who needs a quick SSD. But I hope, that OCZ has learned it's lesson.