Flat is in a good location, with convenient access to tube station and food options, and Sergio is very timely with all of his communications. However, our stay did not live up to expectations primarily due to the following:
1) Toilet in master bath was not functioning properly after initial use and deemed unusable after Day 1 of our stay. Sergio was unable to get a plumbing service to come during our 8-day stay. Also, there was a strong odor of sulfur coming from the toilet water -- not sure if this is normal/specific to East London.
2) Wifi signal/router was spotty and stopped functioning properly midway during our stay. Sergio offered troubleshooting solutions, but we were unable to obtain a network signal.
My main critique is if the host is not going to be in the area is fix problems as they arise, he should make sure someone else is available to address matters. Given the issues we encountered, Sergio credited us a discount to our account after our stay.