Concierge.com's insider take:
The Berkeley's Knightsbridge location—home to Harrods, Harvey Nichols, and every luxury brand known to man or woman—has firmly established it as one of the most fashionable hotel addresses in London. The 214 rooms (60 of them suites) were each inspired by a top designer; for example, the Chelsea Suite, with a decor of mahogany wood and deep browns, tips its hat to David Collins. A recent refurb by interior designer Helen Green has leant a dramatic air to some of the rooms, with dark reds, monochrome, and objets d'art, while others are traditional with a modern twist, in shades of green and silver paired with mahogany and crystal-patterned mirrors. The top and second floors have terraces and balconies overlooking a church rather than bustling Knightsbridge. Our favorites include room 415, for its exquisite green color scheme and traditional hand-crafted English furniture; and room 110 for its spacious balcony (fresh air for a fraction of the price of a terrace suite). The accommodations vary in size: Rooms start at 264 square feet, and suites start at 431square feet. Other winning touches are the top-floor pool—it has a retractable roof that opens in fine weather—with stunning views across Hyde Park and beyond; two famed chefs in eponymous restaurants (Marcus Wareing and Pierre Koffmann); and the Blue Bar, with its "Lutyens blue" palette (a lavender shade) by designer David Collins. And while we concede it's a mere fashionista gimmick, we love the Prêt-à-Portea, a chic high tea service that includes tiny cookies and sweets intricately decorated to resemble designer pieces, such as a Louboutin stiletto.