I am a first trumpet out of my 500 kid school, and first trumpet out of jazz band, and I have to say, the sounds are nice and realistic. The valves are nice and easy to use, but there is one thing to change, the mouthpeice pitches... It takes a bit of time to get used to changing the pitch every time I go up a half octive. If that could be changed to be easier to use, this would earn 5 stars! Great job, especially since its free, just try to make it easier to change pitches.
I do relize that making a trumpet app is not the easiest thing, especially since it would be near impossible to change dynamics, and do all the fancy jazz stuff likes slurs. Overall, very nice app, recommended to both beginners and veterans.