In summary, we had a fantastic stay in a very convenient location and a luxurious apartment - would definitely recommend!
The only reason why I could not give 5 stars was the wifi. The wifi was really slow and even more painfully dropped signal every 5 minutes. This was unfortunately less than ideal as some of us needed the wifi in order to work and attend some meetings - which ended up being impossible given the intermittent wifi. The host (Kevin) did apparently spend an hour at the apartment and did not experience anything wrong, which is a bit disappointing as I showed him screenshots afterwards showing how the wifi keeps dropping - to be very honest Kevin was not too helpful and ignored the fact that the wifi was still not working as it should after his visit. My only conclusion on this matter was that the wifi becomes unstable as more devices are added - we had 5 devices added.
Ignoring the wifi, pre-check-in communication was great and detailed (Mel was a gem throughout). Check-in was really easy. The apartment was both clean and really luxurious and spacious, we were 6 adults and 2 kids and the apartment fitted all of us with ease. Perhaps not the easiest with the bedrooms on the 3rd floor sharing one bathroom, but we made it work, and everything else about the apartment was spot on.
The location was also great, either a quick 7-minutes walk to Clapham Junction station, which pretty much goes everywhere, or a quick 10-minutes walk to Northcote Road which was buzzing with restaurants etc.
Overall highly recommend this unit, Mel was great, and the unit enables a fantastic experience of London and the greater England!!