Good service, slightly strange layout
This is a professionally run hotel with good staff. But rather than being one building, as it appears when you check in, I think it is an amalgamation of a number of buildings. Our room was a long walk from the inadequate two elevators, twisting and turning down a number of narrow corridors. We could see from google maps on our phones that we were a block behind the street facade.
The discomfort and awkwardness of the walk to our room was worrying, but the room itself was fine. Large by European standards with a very comfortable King-sized bed.
Bathroom was small, with a very narrow tub with shower. The shower curtain was awkward to manage but there wasn't room to update to a more modern design.
We had dinner one night in the Brasserie, where the food was good - definitely with an Indian twist. My spinach ricotta ravioli had a butter chicken type sauce. Not quite what I expected, but very tasty.
Location very convenient for Buckingham Palace (unless the Queen asks you to stay with her) and Westminster. Westminster is quiet at night, but there are some pubs in the area, and hotel staff recommended a good gastro pub one night for dinner.
Our room overlooked the playground of a school. As it was September, we had lots of noise between 8 and 9 am each morning.