You have a screen that simulates the actions of buttons and pads, which isn't going to give you the same feel as having dedicated moving parts to accomplish the same goal. There's a lot more to it than just features and convenience. Nothing wrong with software, if it works for you then that's what you should use. But there are people that will still pay thousands of bucks for a trumpet instead of ripping a sound bank off the internet that will basically simulate the same thing.