I have to say booking on their website is a pain.
1) Why can't I build a rate profile (turn on AAA, turn off prepay, turn on promo) and see what the best prices are across a set of properties?
2) How come, when I drill down to a specific property to see the different options I need to generate another search? I've already given them the data.
Both Marriott and SPG sites are much easier.