I have stayed in both SL and RPC in the main bldg. I liked SL the best. The food offerings were the same in each location. The breakfast was very nice, pasteries, cold cereal, toast, bagels, fresh fruit with yogurt and cold meats. At 5:00 they put out 2 hot appetizers and some sort of cold salad. Later in the night the deserts were out, usually 2 items and cookies. None of the offerings were a meal substitute, but I had enogh so I could skip a meal if I wanted to. Having stayed at both locations, I would not pay the xtra to stay in the main bldg again. I thought the rooms in SL were closer to the lounge and a more compact layout. The elevator in the main bldg was slow and you always had to dig out your key card to get past the 2nd floor. They were always crowded and many time we would have to wait for another elevator. The rooms are exactly the same in size as well as housekeeping service. I found the concierge staff to be more friendly in SL. I'm glad I had a chance to stay in the main bldg ( a dream for 19 years) but I will go back to SL in the future. The only thing is there is no live music in SL, but I would take my afternoon snack over to the main bldg and sit in the lobby to listen to the piano player. I never mind spending money on my vacation, but this is the one time I don't think the xtra $150.oo a night is really worth it.