We were 3 friends, we stayed in Ali's flat for 5 days/4 nights and it was really great! The location especially is perfect because you can catch either the metro or the bus and you are really close to Paddington train station (to go to Oxford for example).
The place is clean and matches the description. It is a bit old but you have all the essentials. As already mentioned in previous comments, it is a bit noisy due to the street but that was not so annoying for us (we had earplugs).
Ali answered quickly when we contacted him and keep us informed about keys collection in advance.
I would recommend this place and also come back here for our next stay !