When traveling in the US it is a great place to check in for flights as well. On the family vacation earlier this month we dropped the bags with the skycap (the Premier line was long that morning in DEN) and decided to check in at the gate. Got to the gate and saw the line there was about 20 people deep (777 to LAX) so turned around and stepped into the RCC and were checked in within about 2 minutes. Plenty of time for a cup of coffee and a danish.
Besides the ultility of being able to use the clubs, it is a real treat for my wife and family to use them when traveling with me. I kind of take club use for granted being in them so often, but the family gets a big kick out being able to use them.