I've stayed at Hajnalka’s for 2 weeks and can definitely recommend it! There's a large balcony overlooking a park and Canary Wharf skyscrapers if you look forward and a water canal if you look down. To be honest I had been a little worried before moving in that the canal might be smelly or not pleasant or something which turned out NOT to be like that at all! It's a nice and quiet place to walk by in the evenings. The flat itself is spacious and modern with new furniture and everything you need for a stay, even be it a long one.
Hajnalka was super-friendly and helpful!
So basically I can't even come up with any cons, for someone it might be a 15min walk distance to the tube, but for me it was not a problem. It was a really pleasant stay.