I prefer the RCC due to the fact that I have a membership, and enjoy the ability to step right off the plane, and walk into the RCC..
Upside to the RCC
- Large area to sit around and work or relax
- Small bit of snacks
- Great for plane watching!
- easier to get to, if you are connecting in DEN
Downside to the RCC
- can be pretty busy during the morning and late afternoon
- drinks aren't free
- snacks are always the best - just cheese, crackers, chips, etc...
Upside to the PC
- Can be a quieter area
- Free Drinks!!
- Some better snack items
- easy to access if you go through security via the Concourse A bridge
Downside to the PC
- Much smaller space
- harder to get to if you are on connecting flights
- can fill up very quickly, depending on the time of day