I highly recommend a stay at the Nell Gwynn. My one bedroom flat was exactly as advertised. That said, I wouldn't recommend it for more than two people, even though it can sleep four. It's located in an attractive and convenient area and the staff was helpful and friendly. But note: bring your own wash clothes for the shower, and detergent pods for the clothes washer if you plan to use it. If I return to London, I will definitely book a flat there again.