I got one of the very first SD7s available in the USA. I had never owned a Ketron keyboard and within one week took the SD7 out on it's first gig. I posted a video of that gig on youtube. Since then I have seldom played my Tyros 4. I have owned and gigged with the Yamaha PSR3000, Tyros 3 and Tyros 4, Korgs PA1X and PA1XPro and PA900 and the MicroArranger, Roland E50, and E80 and the BK-7M. None of these products come close to creating the professional sounds I get from my SD7. It is extremely easy and simple to make tweaks to styles and the new color screen is the best I have seen anywhere. So far I have not run into any major issues that would ruin a gig or cause panic on one. Yes, I am a very happy with my SD7. By the way, I gig anywhere from 4 to 6 times every week - usually one hour gigs at Senior venues. Been doing that for 10 years now. What I think this group should know is what kind of positive reaction I am getting from the folks I perform for. They are completely blown away by the feeling and tones of the SD7. For the first time EVER - when I changed keyboards folks could tell the difference. When I asked them which they preferred - the Tyros 4 or the SD7 - 100% choose the SD7. As for styles - I found over 6000 legacy Ketron styles and downloaded them free - then converted them for my SD7. I have now wanted for styles to try out. After finally figuring out how to play styles directly from the thumb drive it was really easy to setup gig play lists or put songs in categories for quick reference. What I thought were OS issues were really my own misunderstanding of how the OS worked. I did experience one or two freeze-up and had to reset the SD7. As it turned out it was a problem with some of the styles I had downloaded. I have never had the SD7 do that using the factory stuff.
Anyway, that is my 2 cents worth.
Deane