I like to think I'm semi-mechanically inclined, so the fact that this comes without instructions was not too troubling. However, I had to go to the video someone else had posted in order to figure out how to install this (no comments!). Once installed, it's excellent - the best way to secure your power block underneath your pedal board and out of the way. The only other thing I guess I assumed was that you'd have a little flexibility in where it goes, but at least on my Classic Pro pedalboard, it has to install in the space closest to the audience side of the board, which I wasn't crazy about. Otherwise, it would have been 5 stars.