Actually, I've gotten stay credit at the various Hiltons on P/L rates. All you do is charge some small incidental to your room, and voila!, stay credit! This will help in maintaining your status with them, if that's important to you. (It is to me!) Otherwise, as a Hilton HHonors Gold, I'm treated just as if I were on any other type of paid stay: lounge access, room upgrades, newspaper of choice, etc.