This box really shines in certain situations, but using it can be frustrating for two reasons. First reason is that I've always had a heck of a time running 12 gauge wire into this box - maybe I'm just using it wrong or something - but I've had a time to even run 12-2Nm wire stretch into this box. (Damn, it definitely doesn't want to come out!) The other problem I've had is that when you try to attach them to the counter, they always push back into the wall a little, and there's no good way of doing that to predict how hard it will slide, so I usually try to screw them into the box, maybe 1/16 to 1/8 inch above the wall I'm trying to level them with. Those issues aside, however, they're perfect if you need to remove an existing bolt box to run new cable, or if you just feel like you need an old working bolt box.