Stayed in the flat for 2 weeks while visiting London for the first time. Within 30 minutes underground ride to most places in central London and the entrance is just a bit outside the apartment so takes less than a minute to start your journey. Location is also just across from a large grocery store and within walking distance of numerous restaurants so really is perfect for long and short stays. Flat is located away from the street so noise levels are low for being in a downtown city area.
Wifi speed was a consistently fast around 50 Mbps and we were able to have multiple devices, video streaming, video calls all going.
Mattress on the double is super comfortable while the larger king size is a bit springy but nothing painful for the average sleeper. Plenty of blankets, sheets, and pillows available to sleep 2 couples.
Kitchen is decently stocked to cook meals for 4 but you will be pressed for going over that. James had provided some basics to get you started (coffee, tea, milk, spices) which was very convenient. We had no problems cooking dinner every night.
Overall an excellent stay and we'd recommend this flat for families visiting London who want those home amenities.