The clue’s in the name. This is about ascending into a realm that’s more supremely stylish abode than hotel. The city’s babble ceases at the Stone Curtain, an entrance wall designed by Thomas Heatherwick. Beyond, two flickering lanterns (good feng shui) light guests’ path up, up, up… via escalator and lift, past scattered artworks of sinuous curve and tempting texture. Rooms – wonderfully spacious, filled with sky – begin on the 38th floor. At this height, Hong Kong’s harbour is a glittering distant necklace and, depending on the room, the reach-out-and-touch mountains a vision of tranquillity. Forget the usual trimmings: there’s no check-in desk, no pool or spa and the gym’s tiny; there isn’t even paper – guest information arrives via an iPod Touch. Elsewhere, though, the amenity bags burst with REN skincare products, there’s a hidden lawn, a library with flickering fireplace, and an enveloping sense of urban respite. And, on the 49th floor, is a single, perfect restaurant called Café Gray Deluxe, a gem set in the clouds.