The house in Bethnal Green is beautiful, well designed and well equipped. The location is also great - 10 mins to Tube and Overground and only 20-25 mins to Liverpool St Station. The downstairs area is really comfortable and the kitchen has everything you'd need. The upstairs bedroom is super comfy and there are a bunch of nice touches around. The bathroom is really luxe too - the steam shower is a very fancy touch.
My main issue with the stay is the management of it - if it were hosted by an individual it would easily be a 5 star property. Under The Doormat make things needlessly complicated in a number of ways, needing a long guest registration form and asking for a number of details that shouldn't be necessary given booking through Airbnb. They also charge very high amounts for extras - cots and high chairs are significantly more expensive than others we hired on our trip and also an incremental charge for late check in; purely because you have to meet someone from the 'guest services' team. Given that this could be solved by having alternative or self check in it just seems like a business trying to make some extra money on top of property management. While under the doormat went to lengths to be present it feels impersonal and just felt like a managed apartment rather than someone's home.
All in all a great place to stay - just some simplification needed from the property managers.