Bethnal Green is a fun spot to stay and I felt safe walking around. There are lots of cafes and restaurants as well as markets for what you might need. The flat is easy to find and Cath and her friend Ketch are really cool and interesting individuals. They made excellent recommendations for bars and places to check out.
The room is a good size for 1 or 2 (one bed) and there's plenty of storage for your stuff. There is an air freshener in the room so of you have any scent sensitivities, drop Cath a line to see if it will work for you.