Do Pros use arranger keyboards? Absolutely!!!The best Pros that I personaly know ALL use arranger keyboards. We use them in different ways, but still take advantage of their features. Full keyboard for your piano performance,,It's there...Left hand bass, drums and piano, bingo you have it..Full blow BIG arrangement performance, You've got it..NOW why wouldn't a PRO want to use this keyboard. The people who complain or look at this in a negative way are not the real pros, especialy if they do not give these keyboards a try, and learn to master the technology..If they don't, they will lose their jobs to the arranger musicians. As for teachers looking down on arranger keyboards, they are "OLD WORLD" and need to broaden there views.. Drums, they sound good on every mid-high price range arranger on the market today..I would encourage anyone to give these keyboards a chance...Yes even you die hard negative opinion "PROS"...Fran