Getting too old to schlep heavy gear around. I bought the S1, 18 lbs, and the sounds, acoustic pnos and EPs are pretty good. The action is similar to a B3 although the keys aren't waterfall. I downloaded a few of the Platinum pianos from their website. So far, I'm very satisfied with the sounds. Even the jazz organ sounds OK. I also bought a Peavey KB2, about 34lbs. Everything is easy on the lower back now!