Plus: The price was very good for central London. James was very helpful in his communication. When the issue with the double air bed was pointed out, we came back to find a single one inflated. We were there for one night with minimal luggage.
Minus: Why's that last one a plus? Although you can sleep four people in here, I'd say it would be suitable only for one or two nights. Even with fewer people, think before booking this for longer.
The double air bed mentioned in the listing is there (it was under the bed) but there's no pump for it in the room or anywhere obvious in the flat, so we had to ask for it to be inflated.
Thanks to turning the living room into a third bedroom, there are three bedrooms in a small 'council flat' (for non-Brits, think basic level public housing), all available here. None of them have a lock, so you're possibly staying with two other sets of random people and no way to secure anything.
The downside of the location and the design of the block is that you've got the choice between having the noise of the road or having ventilation in the room.
Although there was at least one other person in the flat, we never saw them. Fortunately, they knew where the light switch for the hall is: because there's a glass window above the door, it needs to be off at night.
While not misleading, the photos show the place in the best possible light. The flat itself isn't in great condition, with floor tiles missing from the small bathroom for example. (There was also no plug for the sink.) We didn't use the kitchen: someone else had left it in a bit of a mess and there's nowhere to eat except in your room.
So on the one hand, it can be good value, on the other, you need to know what you're getting.