My stay at Jason's place was everything I was hoping for, and more. Jason is a very welcoming and helpful host, and the accommodation is very clean and comfortable, with some nice additional touches.
The flat is located very near Gunnersbury station, so is very convenient for both Underground and Overground services around London. You can get to central London in 30 mins or so, or be in lovely Kew / Richmond in 10 minutes. Ideally situated for anyone visiting the National Archives or Kew Gardens. Plenty of local amenities, with a good sized local supermarket and various small shops, cafes and pub. The area is very safe, and fairly quiet even during rush hour. Access to the property is very straightforward.
The flat itself is very nice - modern and well-designed. Jason keeps it very clean and tidy, and there is plenty of space. Guests have access to an open-plan lounge/kitchen area with space to sit and eat, and a comfortable couch to watch TV. Jason was happy for me to store food in the cupboards / fridge and cook in the well-equipped kitchen.
The room is a good size with a very big, comfortable double bed. There is also a small desk to work at if you need to. Plenty of wardrobe space etc. Guests get exclusive use of a good sized bathroom, with bath and shower. Again, as with the rest of the flat, the room and bathroom were spotlessly clean.
Everything about my stay was ideal from my perspective, and I fully intend to book with Jason again.