> You're just as likely to get a "good" room with HotelTonight as you would with Priceline, Hotwire, etc.
Can't speak for every hotel (obviously), but I know for a fact this isn't true for several.
Hotels always have better and worse rooms - it's very rare to have a building where there isn't a loud/dark/musty room or two.
In most hotels where I know a member of staff, they freely admit to having several 'worse' rooms which are given to booking.com/priceline etc guests first, regardless of availability.
They purposefully save a few 'better' rooms in case valued customers show up last minute. For some reason, HT customers get lumped into this category - maybe because it's assumed they have the purchasing power to become a 'real' customer in the future (but that's just a guess).