Very amateur

Heads up - its more like a game than a music production tool. If thats what you want then by all means go for it. Just to point out a couple problems:
1. Destructive editing and no undo
2. Lame and cluttered sample editing function
3. Overall poor sound quality and absolutely useless effects that are all just variations of delay
I expected something more and ended up deleting it off my iPod pretty quickly.

Fatboy2000 about DopplerPad