I don't have one, but I have been considering its 8-outlet sibling (the 8R15AUD) for a while now as protection for my entire system (currently using a Panamax MAX5100 that's getting close to 4 years old and has taken some surges over the years). Of course, I'm connecting to a 15A circuit, not a 20A. If you are concerned about current limiting and making full use of your 20A circuit, you could consider their 2R20.