our opinion
The bar is usually full of dating couples, smart business people and occasional tourists, and it stays busy often until the early hours. The restaurant also serves until at least midnight and the menu includes a "by the piece" section featuring sushi, satay, tempura and oysters - perfect for late night nibbles.
When the party's over, a night in the W's guest rooms is certainly worth looking forward to. All have the latest high-tech accessories - high speed internet access (wireless or wired), CD and DVD players and web TV.
The W's location in up-market Polanco is ideal for sightseeing, being close to the museums and parks, and is also convenient for the city's best restaurants. Don't forget to save some time to enjoy the fantastic spa facilities at the hotel - these have to be some of the best we've seen in a city property.
It's also worth noting that we found all the staff without exception to be friendly and efficient. In many "design" hotels it's sometimes the case that looks take priority over service, but the W certainly offers the best of both worlds.