I needed a place to stay in London for 3 days before moving to France and chose the Richmond area as I know it’s a nice village. This flat is not in the cute part of Richmond but off a busy road that runs I to central London. That was a bit disappointing to me. However the flat is set back from the road so that there really wasn’t much street noise.
It’s a small flat despite having two bedrooms so with 4 people I think you would feel cramped. The bed I used was comfortable but I used my own pillow as I prefer down. The hosts were very responsive to any questions I had. I did find the flat expensive for what it was and the spaces are small ( bathroom, kitchen) so I wouldn’t recommend it for long term stays but if you need a place to stay for a night or two it is adequate.