There is one other benefit of HHonors, over both Starwood and Marriott, that hasn't been mentioned. HHonors award stays count toward status re-qualification. This is potentially huge and I'm surprised it has not gotten much press here on FlyerTalk. Not only do you get the value of redeeming the points for a free stay, but the stay/nights count towards renewal. This could be considered the equivalent of getting twice as much value out of each award night. Every award stay is one less hotel stay you have to pay out of your own pocket towards re-qualifying.