I haven't had any real problems with P6 since SR1.

But, IMO, the "memory bug" that P6 had before SR1 was a really serious issue, if only because it corrupted your files. P6 should not have been released with that kind of bug.

I never had anything near that serious a problem with P5, but SR3 was out by the time I bought that.

I will probably buy P7, if the price is reasonable.