So theres samplers and then theres SamplWiz. The app architecture is brilliantly matched to the iPhone interface. The presets are more than enough to whet your appetite for some creative adventures, and the sound is powerful and clear. This is one handy toolkit for serious players and even non-musicians could have vast amounts of fun with this.
PS - I had an issue with the app shutting down right after launch. I tried a few things, one of which was to disable the play audio on startup and the wizard animation. Dont know what fixed it but havent had a problem since.
Harrison Floored about SampleWiz