Sarah and her team is extremely helpful and timely in their responses whenever we had any questions. Several weeks prior to our stay, they provided us with detailed guest manual and separate check-in instruction, and also checked in right before the stay and provided the key code for check-in. The check-in process is relatively easy, despite it did take us a little time to find the gated entrance for the flat complex, and the actual flat unit (it's in the furthest building on your left). When we arrived, we see the Day 2 UK arrival test we ordered has been placed on the dining table - appreciated that they taking care of that!
We were there for an entire week, overall the stay was very pleasant except for a few issues we encountered - with the major one being the musky smell of the flat, especially in the living room and main bedroom. We had to keep the windows open during the day (quite cold in late November weather), and it only got better after a few days. I hope it will get addressed for the next guests, as overall the place is clean and nicely decorated.
The location of the place, despite being quite far from the city center, is very convenient located close to the Clapton Overground station (10-12 minute nice walk through the park to the station, and 3 stops to London Liverpool street, where you can then transfer to get to city center / all the touristy spots), and the bus stop is right outside of the flat complex (e.g. 55/56 line to Oxford Circus) - you just want to budget enough time for the transportation.
Not a lot of dining options nearby - most days, we ate breakfast / had coffee at the Tram Store (next to the Overground station) and had dinner at the Princess of Wales pub next to the flat, both we really liked though. There is a convenience store very close by as well where you can get water/snacks/toiletries, etc.
The check-out process is very simple as well. We were 20 minutes late past our check out time and the cleaning lady already got here, so got charge for a late fee (16 pounds), which I've paid without disputing anything (though would have appreciated a little more buffer).
Overall I would recommend Sarah's place, especially considering how helpful and responsive the team is. We were in London to explore the city while work remotely, and the super fast internet and the large dining table which we used as a workspace definitely made the process very easy for us.