This is an amazing rack mounted processor. I've had it for a few years and it has some wear on it, but still works perfectly. The worst issue with it is both of the secondary knobs are missing. You can still easily turn the parts they were mounted to and it functions correctly, the knobs themselves just aren't there anymore. This is the reason I'm selling it so cheap. $175 plus shipping takes it. These go on Ebay for over $250, $400 on Musicians Friend and list for $600. Like I said this is an amazing guitar processor that works perfectly. (It works great on bass as well, I used the reverbs for my fretless)