Fran I really enjoyed the Roland G70 OS..in fact when I switched KB's I was lost for a few days & very uncomfortable...without the makeup tools, touch screen, ability to finetune EACH "individual Drum part" & its temperament....same for the sounds & style parts.......again OS is subjective to different people's learning & playing ability, but in no way does all this buying & selling change your talent to play.....many people think it does ....but it isn't true.