The location is amazing! Easy access to multiple underground stations and plenty of restaurants and bars in walking distance. We were there during a record breaking heat wave, and the flat does not have air conditioning. The tradeoff for being in a great location is the liveliness of the area, so it is a bit noisy. If you need to be air conditioned and have quiet to sleep, I would not recommend this flat during heat waves when you will want the windows open for ventilation. James did provide a fan for each room, which is sufficient outside of 90* weather.
Other than the heat, which is entirely outside of James' control, the flat is lovely. It has everything you need - fridge/freezer, kettle, French press, microwave, and washing machine. The beds are comfortable, with a sofa and ottoman that pull out for additional options. Check in was a breeze and check out was even easier. James was even able to accommodate an early check in for us!