Decided to visit the new SLS hotel and casino the last time I was in town in January. Ended up spending a few hours gambling there and, though I didn't win, I did enjoy myself. In the last few weeks, I received a nice mailer offering me pretty much any two nights for the next 3 months. Since I am coming to Vegas again in a few weeks, I decided to see if they would honor it. After a short wait on the phone, they basically said no problem but just asked for my "Code" number and name. They gave me a confirmation number but never asked for a credit card or anything. That seemed odd to me and kind of concerned me. Has anyone else had a similar experience with this hotel? Having never stayed here before, I was wondering whether I needed to be concerned.