Hmmm...I've stayed all over the place, but particularly in a lot of Hiltons, and I would say that my experience is mixed across the board with getting what you paid for.
But, IMHO SMOKING ROOMS ARE THE WORST INVENTION EVER! Why? In the old days when there was no distinction, maybe 30% of the inhabitants of a particular room had smoked. Now, in the odd occasion that you get a smoking room against your wishes, 90% of the room's occupants had smooked. The old way, rooms didn't smell so bad. But now the all stink! I long for those old days, I'm afraid.