The flat is in a very good location to explore London. In just a few minutes walk one can reach the “notthing hill gate” underground which is a very good starting point to get to know the city. The environment of the flat has shops and many restaurants and bars, which is nice.
Check-in and out worked good and is easy (as long as you manage to get some internet in england).
Unfortunately we have to say that the pictures look much more luxurious than the flat really is. It is safe and in a quite environment, but there are many things that became old and look used. Some investments should be done. E.g. the WiFi was not properly working during our stay (we informed the host).
Nevertheless if you are not planing on spending much time in the flat (what you should definitely not do whilst in London 😉), you will be happy with the flat.