I LOVE the MK5! Super easy to operate and program, and the programmable buffers do a great clean to keep the signal clean. The size is great compared to the ES-8 and the RJM, which was a big selling point for me. It's super useful to use the Songs & Setlists sets to keep everything clean and easy in a live/practice situation. Only downside for me iis ti have to use the midi in&out to connect to a PC/Mac, instead of a USB. Otherwise, this unit is excellent.