Product review (4 stars): Works Perfectly, though the tower is a bit unstable
This system is impeccable, exactly what the doctor ordered. Installation took about 30-45 minutes after verifying that the fridge contained no lines running through the top. I used a 1.5" hole saw to drill through the top. The rest was a cinch.

There was just one thing that needs improvement and that is the stability of the tower. The screws are too short. I would recommend getting longer screws (long enough to go through the top of the fridge) and anchor each with a nut and washer. Drill a pilot hole first though!

Pro-tip: Get your CO2 tank filled at a local Fire Protection company (eg. Cintas Fire Protection). They filled mine up for $15. I've gone through 2 kegs now and no sign of slowing on CO2 pressure.