After the hotel side messed up my reservation without 2 beds in the room and 2 hours later, they decided to move us to the timeshare side (Towers) which is still pretty new. We were placed on the 58th floor and all I have to say is that it's NICE. Relaxing and very "airy" feel even for a "studio" sized unit. The bathroom was clean and of higher end quality materials (which could be seen throughout).
I won't ever stay on the hotel side again after all the hassle that I had but the Towers...that's a different story! Who knows after a few years what it will look like when it gets a bit run down. So stay there now if you can.
The big plus is that the rooms and floors do NOT smell like smoke, which is nice.