Downsides:
Bedding wasn’t the best, pillows were completely flat and rock hard, to the point I got a headache from sleeping on them.
At one point the shower stopped working.
There were no proper seating in my room, and I had some work that I needed to get done but it was uncomfortable for any amount of time.
No elevator, so if you have mobility issues, would not recommend.
Upsides:
Location is great, and for a leisurely weekend it’s perfectly reasonable for the price. Close to train/underground/buses. Very short walk to Hyde Park/Marble Arch.
Great heating, so no risk you’ll get cold.
Another plus was the room service that delivered to your door. Lovely delivery person.