We stayed here mid-week late December booking a room which included 2 dinners at their restaurant. The room was spacious, larger than most Springhill Suites, ultra modern with separate rooms for shower and toilet, each having a sink. Our room had 2 queen beds plus a comfortable sofabed in the living area. The best deal was the 2 dinners which included appetizer and drinks. Our bill for dinner would have totaled $50 and our total rate for the night was only $119.
Midweek there is free social hour with drinks and snacks, which is standard at Marriott Residence Inns, but not at Springhill Suites. The breakfast is the usual Springhill Suites buffet with hot food. I especially like the walnuts you can put on top of the oatmeal. Not all Springhill Suites breakfasts have walnut. One complaint would be their weak coffee. To get Starbucks, you have to pay extra. I usually brew the coffee from my room and bring it down to breakfast. I find that generally Fairfield Inn has the best coffee in their breakfast buffet.
The best thing about staying at Marriott in Las Vegas was the lack of casino machines and smoke. This particular Marriott does not look as nice on the outside, but inside is as modern and spacious as any other Springhill Suites. The rooms are superior to others I've stayed in.