Great experience overall! I highly recommend Elena's apartment especially if you are 2 to 4 people staying. Went there with my Mom and Brother, and they were both really happy with the apartment.

It was well equip with internet, hot water, heater, kitchen, coffee, etc. So you could have your breakfast there.

Sofa bed was comfy.

Neighborhood was near the center but not that busy. Easy to get there from Gatwick and 30 min walk to Big Ben (and other attractions). Otherwise 10 minute bus to Victoria or 2 metro stops.

It has a nice private patio, which unfortunately we didn't use since is not the season for that, but during the summer my guess is lovely.