Every company for in their top end arrangers make a very professional instrument lacking of coursesome wave rom sounds found in their "pro boards" And also lack of 88 key models so were dammed to use an 88 weighted key controller to drive the profesional sounds available. Real time one man bad style sequencer buttons placed thoughtfully and good one man band music stlyes is our things. Of course i'm waiting for an arranger with real time synth controllers in depth editable sythesis ever more arranger control buttons that don't make noise when you click them Like psr9000 (Quiet) to tyros (lighted and clicky) ever try recording all at once and hear the clicking. Vocal harmonizers for me are just there for fun but i still expect their quality to advance. They can give you some ideas for a harmony bu nothing even comes close to real singing. but they have great meat and potatoes sound to make pro music as a pro. But none compare in sound to the korg oasys or poland phantom or yamaha motif. I think this sucks. But i still love my arranger boards.