1. I don't know what you call it, but to be able to stomp just once and have it stop the first loop and start recording another immediately, not restricted to the length of the previously erased loop.
2. A way to keep a loop in memory without having to bend down and save it and be able to go on to create other loops and then come back to the original one without having to use one's hands.
3. A way to control the volume relationship of the looper and instrument.