I found that I have the most trouble with the mini form factor - velcro holds everything else, but the adhesive just cannot grip this size, and they especially get wrenched off the board if they are the first or last pedal in the chain.
No more of that with this gadget - it sits rock solid on a compatible board (but it is still easy to remove by hand). The provided options and accessories are a nice touch. Fits Mooer pedals perfectly (micro drummer and baby tuner), but did not fit the TC Ditto great - had to affix it at a slight angle with two screws instead of four. Not a dealbreaker, and it's still stable, but also not a perfect size for that brand. Also keep in mind that using this limits the mounting options - the mini pedal will be in the middle of a row, vertically. No horizontal or mounting at a slight offset, so it might end up taking up a bit more space than you'd like.