WARNING! A few days after leaving this apartment, I got called by my bank to warn me that someone tried to use one of my credit cards in Brazil. This is a card that I never use or take anywhere, and took on this trip just in case as a backup. I left it in a bag that was very easily seen and open in the living room. The cleaning personnel had access to it while I was away, and it's the only people who could have seen it, as far as I can tell. I didn't know there was room service so it was my mistake to leave it there, but I was disappointed but what happened next.
I contacted Andrew to report the issue and ask him to look at it for the safety of his next cusotomers, but until now, several days after, I haven't event gotten a response from him. I feel obliged to leave a bad review to warn anyone who tries to book this place.
Leaving this issue aside, and assuming Andrew has a good answer, I can say the apartment was nice, well equipped, in a relatively good location (would be better nearby Victoria for first time visitors) and the check in and out was easy. A negative thing is that they don't have a luggage room, so if you need to check out late maybe it's better to look for another place or book an extra night. They'll probably say they offer a late checkout option when there are no new customers coming the same day, but I think a place like this in London is probably booked all the time.