I am using it as a reverb-unit, the only thing my amp is missing, and for that it can be easily configured. The in and output volumes you only have to set once, so you basically have 5 knobs to worry about. But they need a lot of tweaking to get the sound you want. A bit to much I think. You have to set it with the preset knob.
Big pro is the noise level.
It is my only rack unit and it is the only effect not giving a extra hum in my setup. About the reverbs - mix them as dry as possible. The unit exaggerates this effect to a new level when set to wet. It hasn't broken down or did anything strange for the past four months, and I have put it in my amp. I soldered it between my pre and poweramp.