I've probably posted in at least one of the threads that Amanda linked, but I worked at a brewery that put them in initially and ended up switching to the regular Perlicks. It just took too much fiddling around to get the side gaskets properly sealed every time we broke down the faucets for cleaning. The losses weren't really significant because they just dripped, but the time and sheer fact that it looked so unprofessional were deal-breakers. This was a little over a year ago, so it's possible the design has been improved.