No TV, very poor WiFi and no toilet roll holders. Not what I would expect for a 4 star hotel. Avoid like the plague, there are much better hotels nearby that are significantly cheaper. I would not rate this above 2 star. The mattress was very old and soft, so a good nights sleep was not possible and the curtains did not meet in the middle so an early wake up with sunrise meant that no alarm was needed.
The duty manager didn’t want to deal with me so pretended that he wasn’t management, then several hours later was the duty manager again.
Spoiled my trip to London.

Looks decent when checking in
Small rooms, which we didn't mind, beds were comfortable
TV did not work
Leaking tub with patched tile
Front desk wasn't overly nice or helpful
Had to get new room key every day
Absolutely nothing special, my advise is to pay a little more for better service and accommodations

We chose this hotel for our one stay while here for a concert. The pics and reviews online seemed good while using booking.com. It’s located in a beautiful building as you would expect near the upmarket Kensington side. The reception/ lobby is clean, modern and inviting. Service while checking in was fantastic, short wait but friendly service and quite quick. We originally booked for the executive room however got upgraded, always a nice surprise. The room is clean, tidy and reasonable.

The in room dining was easy to order and prices are not bad comparing against if you decide to travel out for a meal and back. The chicken we were told was halal. Pizza, chicken sheesh in naan, chips and 2 cokes at £31.

The problem started in the night when the air con failed go work properly and it was too hot to sleep. Room service came to the issue and tried their best but failed to fix it. We left the windows open all night to get air circulation inside. The next morning i went to complain and received just 25% back refund. They allowed us to checkout 30’mins later at 11.30. I was told i would get the senior managers email
But they forgot to give it to me.

Point here is, its all good having a fancy hotel, however if the sleeping conditions are not satisfactory and a goods night sleep is affected because of that then whats the point? Im hoping it was a one off because i liked the location and hotel itself.