Just rec'd BP355 and it has been a blast to play with! For the $$ (about $200) it offers a pretty sweet package (tons of features). One of its cool features is a phrase looper. I have never used a looper before. Is there some trick to using the looper so that the loop will play "in time," rather than herky-jerky starts and stops? Are other devices that are dedicated solely to looping easier to use to get cleaner loops? What loopers have worked for you guys?