The location & the food. Shower was a little small & a little dirty whereas my wife requested for it to be cleaned again.
Nicest room I've ever had in London - really spacious, stylish and completely sound-proofed. Nice restaurant with good choices and prices. Friendly staff. A couple of things not as per info when booking - luxury mini bar, contained 2 bottles of water - not what I was expecting; no iron - although brought to the room when asked for. A bit disappointed with pool area - much smaller than expected - so felt crowed with 10 people around it.