I stayed here and while I survived, it was a bit difficult. We ran into several problems with the unit. First we had trouble checking in because the key for our unit was missing. Fortunately, the host quickly responded and moved us to another unit. So kudos to the host for that. However, I was not able to connect to the wifi for my entire stay even after asking the host for help. The lift was also out of service most of the time I stayed there. I would not normally mind walking up the stairs, but I had a lot of luggages so it was very inconvenient. I also found the bed a little small for two people.
On the positive side, the flat is in a nice location. It's a short walk to hyde park, and it's a short metro or bus ride to soho and mayfair. There's also some good restaurants and coffee shops in the surrounding few blocks. Definitely eat at the Mango Tree restaurant if you stay here!
If everything at the flat was functioning as expected, this would be a pretty nice place to stay, but sadly for me it was a difficult time. I hope the host gives the building a little attention and fixes the issues for the future guests.