I love the Boss DD-8 digital delay pedal. It's a lot of fun to experiment with the different delay types and the feedback and time parameters. I am considering getting an expression pedal to connect to the delay pedal. Excellent pedal for those trying to capture the essence of the psychedelic experience through guitar. recommend ordering a PSA AC adapter (check the instruction manual for the appropriate type). It came with a 9-volt battery already in place so it was nice to be able to use it immediately.