Ok, 4 only Stars because I can't really be blown away by a power supply. I own the 1-Spot and a similar competing product which I use to power my pedalboard. Theoretically, either of these units would power all of my modest collection of 8 pedals. However, I feel that as you add pedals, the odds of running into a noise issue increases and besides on my board its easier to get clean wire runs using two of these units. I've split the load between the two units, but if either were to fail, I could quickly reroute the wiring so one supply covered all, which gives redundancy. I've not had any issue with noise using this unit. I am a hobbyist player in a basement jam band and several of the players use the 1-Spot as well. If you have 18v pedals and don't want to run mulitple power supplies you are stuck spending the big bucks on a more expensive unit, but there is no need to blow 4x the money to power your 9v pedalboard. Get two of these and be sure the show goes on, even if one craps out.