If you are staying in London and are looking for a quieter, more residential area, this flat in Kennington is an excellent choice. We found several great pubs nearby for food, pints, and watching sports (highly recommend the Black Prince), which was the best part of our stay. It is also just a 4-5 minute walk from the tube station which gets you anywhere in the city quickly and easily.
Umberto's space is a true "home sharing" Airbnb so his personal belongings take up some of the space for clothing or luggage, but it was well-suited for two people. It is not a large place although that would be hard to find in London. It is charming and brings in natural light, with a refined style especially in the kitchen and bathroom. We did not spend extended time in the flat during the day but it would be a comfortable place to hang around in. The bed was very comfortable.
Umberto was communicative and check-in/out was easy as can be.
For the cost, there are probably some better values out there but we expected to pay more to stay in/near London and our Kennington experience ended up being well worth it for our long weekend trip.