My wife & I stayed here for a week in early-middle July, and used it as our base for exploring London and the South of England. This is a great location, about 2 minutes from the Stepney Green Underground station and there's a bus stop right in front of the flat. There’re 2 grocery stores and 3 ATMs nearby.
The building is secure, requiring an RFID fob to get in. The door to the flat takes a key to open and is spring loaded and closes automatically -- make sure you've got the keys if you're walking out! :) Key/fob pickup is in City Supermarket ~7 minutes down the road, so plan on making that walk upon arrival, otherwise you won’t get into the building. Dahlia will give you the key code and address for pick-up/drop-off.
The flat is up the stairs to the 1st floor and there's no elevator. There's no air conditioning in the flat, so consider that if you come during the summertime. The stove vent fan can be used to pull in cool outside air through the windows. As the owner states, you're "on a main road so you will be able to hear the hustle and bustle of London" -- especially if you have the windows open. :)
The flat is modern, clean and comfortable, with new appliances, LED lighting, Wi-Fi, plush bath towels, and a clothes washer/dryer all-in-one unit. The double bed was comfortable, and I had no trouble sleeping on it.
Dahlia, our host, was very nice, and easy to communicate with via Whatsapp or VRBO’s site.