We stayed here for a week on a friends trip, we are both from the US so this is a very American-centric review.
Communication was great and had no problem finding the place or checking in/out. They do not require 1000 things for check out which I appreciate. Neighborhood felt safe, this studio is a garden level so you're below the street. This is England, there is no a/c or fan for my Americans traveling, this is standard. To cool it down you open the window, it can be a little noisy if you like going to bed before 11pm, but we were exhausted enough to not care. This is a small space and down a flight of narrow stairs, just FYI for those with mobility concerns.
Just in case you don't realize like us this is not a bedroom with a bed then living room with a pull out couch. It's a studio with a pull out couch. We were surprised by this, but then looking at the listing after we were there it makes sense. The "bed" was not comfortable, that's putting it very nicely. When we were leaving we noticed there were IKEA deliveries in the hall so it's possible there will be an upgrade.
The location is what made up for everything. It's close to plenty of public transport and Hyde park is just a short walk. There are plenty of places to eat and some convience store type shops. It's a great location for the price.
If there were an actual bed with mattress we'd book again in a heartbeat.