It should come as no surprise to anyone that in trying to shove a grand piano into a roughly 4 inch wide space, something is bound to be sacrificed. That said, I'm initially impressed by this program. For six dollars, amateur and professional alike can block out the next number one hit, including creating a skeleton with chords. This is a giant step up from what I used to have to do, which was carry around a mini tape recorder so that I could hum a few bars when I came up with something I liked. Now, I can tap out a few bars and hear it played back to me with a minimum amount of effort!
All that said, anyone looking to jam on their iPhone may find themselves a little disappointed. You only can fit one octave at a time on the screen, so it can be difficult to play more than a very basic number without having to perform some finger acrobatics. Also, I notice a bit of a lag, so this program is not suitable for creating performance quality music. On the other hand, for $5.99 it's an amazingly fun toy for kids and adults alike, and it opens up a tremendous amount of possibilities for the budding songwriter who finds him or herself with a few minutes of creative time while on the go. I truly recommend this program to anyone interested in playing and composing music. If the publisher can fix the lag issue and add an export feature, I can see this being the next Garageband.