Great hotel! I took a single room which was not big (but it was clear at the moment of booking thanks to the pictures) but freshly renovated and comfortable. The environment is pleasant (quiet street and the hotel faces a park) and Hyde Park is 4 mn walk. Good connection to the London transport system too (bus and tube).
Breakfast is ok (many industrial product but many options) and I liked that you can buy eggs for a xheap price if you want more.
Globally speaking, a very good address to stay in London.