The idea behind this app is great. I can see it being a great resource for musicians; however, I was really dissapointed with the quality. It is difficult to use because the buttons and levers on the screen are hard to control. It is hard to understand what this app can and cant do and I find that it is a frustrating trial and error game. There are too few features to make this app worth while. It could use more tracks and the ability to add drum fills and breaks so that the drums arent so monotonous. It would also be nice if you could set the drum speed because the given speeds dont always fit with the songs I want to record. Hopefully updates will come with more features and better calibration.