I haven't used one of those, but the problem I see is one of foaming . . . if you get one of these, you'll probably have to turn the pressure down for serving otherwise you'll end up with a glass of foam.
With a standard beer fridge setup you'll pressurize a keg to 10 or 12 or whatever psi and have a length of line to help restrict the flow and drop the pressure to ~0 at the faucet. With that thing you don't have the line, so unless it has some kind of restriction to instantly drop the pressure you'll have to dial back the keg for serving, then turn it back up to keep the beer from going flat.