Mandalay Bay is generally my first choice when I stay in Vegas.
Price- Average.
Service- Excellent each time I've been here.
Night clubs/bar/restaurants- Been to most of them. Rum Jungle is still pretty crowded although not the hip place to go anymore. If you are staying at the Mandalay/the Hotel, you don't have to wait in the same line as everyone else. However, you still have to pay the cover. All the restaurants are great.
Location- At the end of the strip. Cab rides are dirt cheap, trams are free or you can walk the strip.
Casino/Crowd- Hardly gamble here. Tables are expensive and I never win here. Young and old crowd. Hip especially since most stay at the Hotel now. I love the layout of the casino though and everything is very easy to find.
Rooms- Standard rooms are VERY spacious as are the restrooms. The restrooms are almost as big as some other hotel's room. Separate room for toilet, standing shower has clear glass door, separate jacuzzi tub, and double sinks. No one checks your room key at entrance. Gilchrist and Soames toiletries.
Friends stayed at the Hotel. Although ultra modern like the W, rooms are quite small and more pricey. I'd rather stay at the Mandalay.
Sports Bar- AMAZING. One of the best sports bar in Vegas.
Pool- Wave pool and lazy rivers. Always ridiculously crowded. A room key will allow you and one guest to enter. Go early if you want lounge chairs. Two complimentary towels per room key.