Wow, thank you for all the quick answers. In my further research, it seems the rate of accumulating points is very fast. That is enticing. Other things that Priority Club has over Hilton is complimentary breakfasts and free wifi.

Hilton seems to beat PC in their credit card options and cheaper cost of transferring points (which comes into play when signing my spouse up for the program too).

What other things do you like about the PC program? Are there facets that blow away the competition?