Wow, I guess XAircraft finally decided that they needed to replace everyones FC. I've seen loads of videos online of 650's hooked up to the xa software and it shows the craft drifting in roll, but it's sitting flat on a table. After a matter of a few minutes, it was up to 20 degrees off. I don't think that I have had this problem either, at least not to this extent.
It's actually pretty cool that they caught on and did right by their customers. People have been livid over these problems. I've seen several videos on XA's vimeo channel that make the P series replacements look pretty nice. Hopefully that will make some folks feel better about their purchases and being able to use them for their intended purposes.