I had over 100 nights in 2001 and 48 so far this year. Roughly 90% post without a problem. The rest take a phone call only. No multiple faxes on hotel stays for me!
My Marriott VISA points always post without a problem. Hertz car rentals are my biggest headache, and the problem is definitely Marriott, not Hertz. I have proven that over and over again.
Bruce