If you aren't SPG don't even think of staying here...
Here is as condensed of a review as I can without reliving my anger and disgust from this stay.
1.) Arrive at 11am. Was told an upgraded room [complimentary] would be ready for us when we go back from lunch if we waited. (Sure, sounts great!)
2.) 1PM - call to the front desk and the room still is not ready. (Ok, lets go shop)
3.) 3PM - [Hotels advertised checking time], called the front desk only to find out our hotel room is still not ready.
4.) 4PM - Show back up at hotel, several groups of people also upset and waiting for rooms as well now. Speak with front desk staff who by this time just gave up on caring and inform us that there are still several Starwood Preferred Guests who still haven't checked out of their rooms and are at the pool. (Not good, and not my fault!) Asked for drinks on the house up at the pool and they aggree to call up to the bar and let them know.
5.) 4:05 PM - Show up at pool bar order drinks and they have no idea about our drinks on the house due to our wait. The bar staff calls downstairs and there is no answer. One more trip downstairs and its finally solved (we thought).
6.) 5:30 PM - I'm starting to get really mad as we still do not have a room (Dinner reservations at 6PM that we will not be able to honor now) so we close out our tab [each drink was ~25 dollars, very small plastic glass and full of ice] we were comped 50 dollars. (Thank You, but even paying 50 bucks for 4 glasses of mostly ice in small plastic cups is a rip off!)
7.) 5:35 PM - Show back up at front desk and kindly re-explain the situation (to a third person at the front desk now) and let them know that we are not leaving the desk until a room is ready. Miraculously a room becomes available and we finally get checked in [6.5 hours later!]. We were promised a bottle of wine to further compensate us for our wait. [It never came :(]
8. The room was super cool and the bed was comfortable. Unfortunately the cleaning crew must have been so rushed that there was a cup of cigar butts left out on our balcony. 
9. After missing dinner reservations, needing a shower/nap, and waiting for the wine (which never came) we went out to dinner around 8PM.
10. Checking out the next day I notice I was charged more than originally agreed for the room. [They tried to charge us for the upgraded room I spent only 12 hours in!]
11. Explained it all to the new front desk staff upon checkout, about the wine that never came, etc. and suggested in lieu of the wine to comp our parking. After a little convincing I got what I deserved. 
12. A few days later I checked my credit card statement to see the charges and i was billed for the upgraded room, UGH! [The discrepancy was refunded with accounting, but I had to again explain my experience to convince her to do it.]
Overall I was extremely disappointed with the property. The front desk staff always had an excuse for our inconveniences and no solution, not to mention every time you went by there were different people there. It's really a shame because the property and facilities are really nice! I am not one to normally complain about hotel stays but this experience was so disappointing, and their allowing of SPG to check out well after the following days check in time just boggles my mind. I booked my reservation fair and square thru the SLS Website (not Priceline or Hotwire) and expected much better treatment, not a million excuses for their shortcomings.