Very easy to install your pedals. It is made to fit 8 Boss size pedals. If you are using some mini pedals you can fit more than 8. It came with enough brackets and screws to hold 9 pedals if using 4 brackets per pedal. Some small pedals work well with only 2 brackets. Dimensions of the power brick holder are: max 6" wide x 1 3/8" tall (152mm x 35mm). The width can be adjusted down to almost 5". Height can't be adjusted. Pros: You no longer need to deal with velcro. Comes with gig bag. Plenty of space for cable management underneath. Cons: The power brick holder underneath can't fit anything small like the MXR M237.