Frankly I would have given a little less than a 3. But then I have not visited any hotels in London to compare them to. The room size (even though they said I was upgraded and was slightly spacious) was the smallest of all the hotel rooms that I have stayed at over last 20 years. The amenities were basic. The A/c was good and the breakfast was decent.

Location, location, location.
Location is amazing, staff are very friendly and helpful. Rooms are quite small (typical for center of London). We first got a room with awful frying smell from the kitchen, but we got another room without a hassle.
Rooms are clean, bads are comfortable, breakfast is also quite good
It is excellent choice if you plan to enjoy touring London and use the room as sleeping place.

Wasn't a great experience. The room comfort, deco, set-up etc just didn't justify the price. Felt quite old. Was in a room that had two small beds which can't be put together. And I wasn't the only one. That means one pays for a double but gets two singles. The kitchen ventilation goes out into the yard which gave off a smell of food in the room. Location is great though.

Great location with friendly staff, but be aware if you book a single room it will be very small. My room was tiny. In fairness I knew I had booked a single room, but this was driven by availability and cost at the time of booking. The room had everything I needed - but it was much smaller than I had imagined.
Location excellent for the West End and a Grosvenor Hotel event I was attending locally. Staff were very friendly and very helpful.

It was lovely staying at this hotel!
Very courteous staff!
Very near to Oxford street and marble arch underground station!