Good location, as the apt is a 5-10 min walking distance from Paddington station (which is a 15-21 min train ride via Heathrow Express).
John was a pleasure to communicate with, and was reachable immediately during an emergency (key broke inside the door lock on our 1st night, and a locksmith had to be called).
The instruction booklet in the apt was also very helpful with information about the area and the apt itself.

The apt was nice & warm, and comfortable for our group of 3 people. I would say that this apt is best suited for up to 2 adults + not more than 2 kids. We were 3 adults, and as the 3rd adult sleeping on the living room sleeper sofa, I did not find the sleeper sofa to be very comfortable (flimsy mechanics, hard to operate).

As noted once before by another reviewer, this is a 'garden' or basement level apartment, which is accessed via a narrow staircase (a bit difficult to manage for elderlies + when moving luggage larger than carry-ons).
Supermarkets were ~7-8 min walking distance- would recommend to have a shopping cart with wheels in the apt (or simply take your carry-on with you).