I’ve been using IGOG for years now and I love it! The samples sound great! I use it for rehearsals with a rock-n-roll brass band I’m in. I plug my iPhone into the sound system complete with subs and monitors, and it sounds excellent! It sure beats dragging my entire drum kit down there every time. I also use it at an open mic I help host, and jam in real-time with musicians that come up to play. They love it, although they’re always looking around for where the drums are setup. I am still waiting for an update for the newer, larger screen iPhones, (it’s been over a year since the last update) but other than that, this app ROCKS!!!