Just finished a week here , C & P plus DSU , first stay. Had a great time, very comfortable suite, separate living room ( although a smallish bathroom given the size of the suite).
Pretty convenient to Marble Arch tube. Nice lounge ( and hardly any guests as far as I could see).
I've always stayed SPG or IHG but after 2 great stays...Andaz a couple of months ago and now Churchill...I will lean towards Hyatt in London.