I had a 100% positive experience at Lark's place.
Lark is a wonderful, considerate host. She showed great flexibility as I extended my stay by 2 nights after my initial booking. Although she had plans for my revised check-out day, she approved the extended stay.
She welcomed me with a bottle of complimentary water, which came very handy as I was extremely thirsty on my arrival. She offered me tea and coffee, then gave me the grand tour.
She gave me a run-down on local attractions and transportation, and at my request, pointed me to the nearest swimming pool. She even asked me what time to set the boiler for to accommodate my brutal early morning regime (shower at 6:00am).
I really enjoyed her house's no-fuss, laid-back, relaxed atmosphere.
Her house is beautiful, all facilities were in perfect working order, my bedroom was quaint and quirky with lots of interesting books. The bed was very comfortable. Plenty of chest-of-drawers and hanging place.
I sleep with earplugs so I can't comment on how much nuisance the proximity of Heathrow may present to lighter sleepers. But even during my waking hours, I hardly noticed the planes - I guess you just get used to them in a couple of hours.
Nearby Richmond town center turned out to be a real gem, especially the riverside on the Thames. (I named it the Richmond Riviera.)
All in all, I can highly recommend this house. I'd be more than happy to stay again in the future.