We had a great time staying at Alessandro's flat. Alessandro was very clear and quick in his communications, which we appreciated and made the check in/out very easy. The location was perfect in our perspective, a very easy walk/Tube ride away from most interesting London neighbourhoods and sights. Alessandro's neighbour was quiet but offered many pubs, grocery and restaurant options just outside his door.
Other reviews mentioned the steep stairs and smallness of the flat, both are correct. The stairs from the first to the second floor are very, very steep, more like a ladder. This is something to keep in mind when booking, although I think the 2nd floor may be accessible from the normal outside hallway, so that is another option to access the second floor. The flat is very small but offers everything one needs while exploring the city, although my normal sized husband found the shower a bit claustrophobic. The flat was very clean - we give it a 5/5 for cleanliness.

Special bonus points, we emailed Alessandro requesting a floor fan, which was delivered by the time we got home. Great place and great host.