Alan was a really nice host. Check-in is normally in the afternoon, but he did let us in earlier cause we were arriving in the morning. The location was really good! Pretty quiet at night, a supermarket nearby. Also, a 10 minute foot-walk to the tube station (Zone 2) and Liverpool Street Station is just one station away, really good transport connection!
The bed was just a bit too hard, but it's okay for a few nights.
So if you're looking for an accomodation near the city centre for a few nights, I would recommend Alan's flat.