I believe there are smoking and nonsmoking rooms.
The Sierra Tower has the best location. It is closest to DL, DCA, and DTD. Most of the rooms are considered view rooms.
The Bonita Tower is the farthest from DL, DTD, and the main entrance to DCA. One side has very nice views while the other side does not.
The Marina Tower is a little farther from DL, etc., than is the Sierra Tower, but not nearly as far as the Bonitta Tower. One side has a fun view of the Neverland pool. You can see DL (and fireworks when they are scheduled) from many of the rooms on other side without necessarily having to pay the additional cost of a view room. The lobby is in this tower.