Pro:
Location: Close to two tube stations and walking distance from the Natural History Museum and the V&A museum. Beautiful, posh neighbourhood. Nearby Sainsbury's for bits and bobs right around the corner. Gorgeous art deco building it was located in.
Checkin: Incredibly easy. Just went to the front desk and showed booking info
Cons:
Bathroom sink was a little grotty.
There were wet bedclothes in the washer that we decided to hang up in case they got moldy. Not sure why they were still in there.
Overall: A little pricy but that's London for you! But it was so well situated in such a nice area so close to some great places and two underground stations that made getting around simple. Lots of nice shops nearby on Kings Road but off the main road so it was quieter. Felt pretty safe for being in the middle of such a big city. Would recommend for anyone wanting to see London from a central location!