First of all I have to admit, that I kind of misused this pedal booster, so my review will be more about the workmanship than its actual qualities and usefulness when it comes to boosting pedals. But from the looks of it it seems as it would be able to fulfill this task without any problems.
So, let's get on with it. When I ordered this booster (along with the PB2) I wanted to bild a second 'level' for my pedal board, because my Palmer Octobus is taking up about a third of it. The Plan was do 'combine' the PB2 and PB3 and place the 'flat' side on the octobus to regain some space.
Trying to do so I found my only major complaint about these two products. They're not evenly built, making it impossible to get them leveled. This probably is more of an aesthetic kind of problem if you're going to use the boosters conventionally.
Also it's my onlycomplaint. Away from this the PB's look and feel solid. Even stepping on them on a regular basis wouldn't do them any harm, so it sems.
One more thing: The velcro that came with one of the boosters wasn't sticky.