The flat was in a great location, with a bus stop outside the building and lots of food shops near by. Flat looked like the photos and while it looked very well used and smelled a little damp (when the over powering air freshener was moved), it was mostly clean. The lady who checked us in was lovely. Checking out - they sent us brief instructions via email (where I was expecting them in the Airbnb app) and required us to drop keys off at a convenience store 5 mins down the road. With luggage this was a bit of a pain.
The biggest issue we had was there was no heating, even though it had been listed as having it. London was in a cold snap and the apartment was freezing. City Relay were slow to solve the problem (taking 4 out of our 6 day stay to solve the issue). Their response time was also slow (not 2 hours like they stated), they were difficult to get hold of - even by phone and there was no apparent communication between themselves as I frequently had to repeat myself.