I bought the $25 version a few months back...my initial impression (and the developer actually cautions about this) is it is very difficult to control your voice precisely enough to end up with something clean that does not require a great deal of editing. And, if you have to do a lot of editing you might be just as well off playing your tune on a MIDI controller to input it.

I am hopeful that this product will improve and/or I will learn to use it more effectively because it is a really cool concept that would be really great for getting the melodies in my head quickly into MIDI!