We stayed at Ben's place in December and it was lovely.
Although we couldn't check-in after 10pm Ben offered to change our reservation and we checked in early the next day. He also was okay with us leaving our luggage there later than check-out while we were still exploring London.
The apartment was lovely. When we had issues with the heating system, Ben responded promptly and was very helpful.
Connections from there are super simple and I recommend staying there to get out of the busy areas to get some quite time at night.
Hint in general: For those who are sensitive to noise make sure to pack earbuds or so since windows in the UK are not as good and you might hear noise from the outside.
For us living in Berlin, however, it was not an issue.
Would stay at Ben's place again and can totally recommend it for couples.
Thanks again!