Everyone rightly praises the location of the Cavendish. It is a tallish, modernish building, surrounded by shorter, older Mayfair, so that if you are above the 3rd floor, the rooms are light and, on the south-facing side, have good views. We had an "executive", which was adequately sized, with a good bathroom, tub plus shower, nicely furnished and equipped, with good tea and coffee facilities. The windows were locked shut and the aircon a little noisy. The loo did not flush well - too little water. There are no "executive club" facilities. There were no rates that included breakfast so the £22,50 charge felt like a rip-off, particularly if you only want a light breakfast but don't feel like wandering off to find a reasonable cafe. There was enough variety and quality in the buffet to enable a hungry diner to feel satisfied.
All the staff were friendly, cheerful and helpful. The lounge on the 1st floor was over subscribed - lots of meeting rooms, so lots of traffic.
Overall, a good place to stay for business or for pleasure.More