Planned a trip to Vegas for our 20th wedding anniversary and selected the SLS as it was advertised as the new \""Trendy\"" hotel on the strip.  Knowing in advance that our flight was not due in until 11 PM or so, I called the hotel several days prior as to note our file with a late arrival. We arrived to the hotel close to midnight, checked in, and went up to our room. When we got into our room, realized that is was not the style of room we booked.  The room was a \""Story King\"", not the \""World King\"" we booked. The world king is a more a traditional room whereas the story is more loft style, with the bed smack in the center of the room, exposed concrete ceilings, open bathroom etc. I would have never booked this room, as to me, it's not a relaxing atmosphere.   We called the front desk immediately to advise them of the error, and their response; \""we are completely booked and gave away your room\"", \""there are no other rooms available, and possibly would be able to switch you tomorrow\"".  At no time did they tell us this at check in.  After several minutes on the phone, the front desk clerk did find one \""double\"" bed room in the 'World\"" tower and said they would also try to switch us to a king the following day.  She told us that they would be sending up a new set of keys.  After waiting almost a half hour and no keys arrived, we went back down to the lobby with our luggage and waited at the front desk,  Naturally, the shift changed at midnight and all new personal where manning the front desk.  After re-explaining our situation, they finally gave us keys to the new room, apologized to us and promised that we would be contacted the next day from \""Guest Services\"" in order to switch to a king room. Since we are Silver Hilton Honors members, I assumed that at least a phone call with an apology or an offer to switch rooms would come; the day came and left and nobody ever contacted us.  We slept in separate beds for our 20th anniversary trip.  It appears that the SLS staff couldn't care less for their guests.