Personally, mine's rock-stable. I havent had to reboot it recently, ignoring times I ran the battery completely down, or dropped it a few feet and knocked the back cover and battery out(!)
I've even got it OC'd, but I did a custom OC, tuning it for the least stable voltage for my chip.

I have a feeling that the two people here with problems either have corruption on their disks and need a reflash, or have -poor- CPU samples that need slight overvolting at stock speeds.