I too have no problems. It runs even better after I did the 6.1 update, and doesn't crash on me like it used to.
I've only noticed some weird freezes when I'm taking pictures and I hit the sleep button too fast or something like that.
I have 3rd party apps like S2V, S2U2, PocketCM, WKtask, flashvideobundle, PPC Pimbackup, and some games.

I just wish it was a little more intuitive and user friendly. Especially for a first time PPC user like me. I've had it a year, and I'm still fumbling on it. But I like it anyway.