Regarding the low price it’s really really worth it. My bedroom mate was a nice guy but of course it depends on who do you have.
For the rest Poplar is linked to many parts of London through bus and underground.
I particularly appreciated that the family is not intrusive and let you do your own life. Nice breakfast, especially because they cooked for us!
Except in my opinion the lack of clean I do not see so many downsides. Special mention to the father Rasul who is so kind!