The apartment itself looks as nice as it does in the pictures, and all the amenities described in the listing were provided (great shower, plenty of tea/coffee, Netflix, comfy bed), plus it's ideally located right next to St Paul's cathedral, only a short walk from the tube station, Tate modern etc. On the whole the apartment was clean (except for the remains of someone's food under the grill on a tray in the oven), and the check in process was easy enough.
However the building works in the building opposite were very noisy in the day, and although they were noted in the listing we still found it was just too noisy for us, and the building works definitely started before 8am (nearer to 7am one morning), so don't expect a lie in! I also found the noise from the street outside at night too loud in the bedroom as well, so didn't sleep very well.
The lock on the door to the apartment doesn't work from the inside so you can't lock your door at night, which made us feel uneasy. Although the host was quick to get back to me, she seemed quite dismissive of the issue and basically told us not to worry as the neighbour was nice. However everyone in the building had access to our floor, and on one occasion we found the front door to the actual building wasn't even shut, so anyone could have walked in off the street. Anyway, the lock situation just made us feel uneasy, as I'm sure it would others as well!