The microphone input on the KN7000 is fine and is every bit as good as any other top arrangers mic input. In fact its quieter than those on Yamaha arrangers including the XLR mic input on the 9000 Pro. Now the harmonizer functions that's another story. Its by no means entirely useless but its not what it should be to be called a harmonizer.

If you can truly "sing" and only need a high quality mic input to put your vocals through and mix them then the KN7000 will fill the bill. Now if you're like about 99% of people who think they can sing but truly can't, you may want to find an arranger with a great harmonizer to help you out and mask those vocals.

I find it silly that so many people want a keyboard that can make, bake, and slice bread for them and bitch when it can't. Whatever happened to the idea of having a keyboard that just sounds wonderful? For realism in sound and features that rival most keyboards out today, the KN7000 is well worth purchasing. Of course YMMV but I feel the KN7000 is a great keyboard and I'll take great sounds and features over a built in harmonizer function any day. After all its a keyboard meant to be played, not a vocal harmonizer. If you need a great vocal harmonizer buy an external device like a TC because it will rival those built into any arranger keyboard.