Hi Joe,
When I got my S950 I tried all my old gig setups from the PSR3000 and behold they all worked just great. I then tried my T3 setups and they too worked but on some songs a OTS was missing. Then I went to my T4 settings and again they played but needed OTS tweaking on many of the songs.

So far I have used it on about 10 gigs and I have no complaints and everyone seems to enjoy it's sound.

Deane