Well, I'll keep it brief:
1- Limited connectivity to central London, it takes an average of an hour to get to most of the popular spots, and it could get more difficult and time-consuming to return back to the hotel at night, due to a further limited number of routes/buses at those hours.
2- The neighbourhood doesn't feel very safe, especially at night.
3- Breakfast was a total disappointment, and waste of money, very few options were available and were poorly cooked/seasoned.
4- The room was very noisy during the morning hours, due to housekeeping opening and closing (well, slamming) the hallway doors with their carts, a complaint was raised to the reception desk but nothing changed.
5- The bathtub is very narrow, and makes you susceptible to falling off (actually there is a warning sticker on the wall highlighting that fact in a subtle way). Moreover, the heating system has issues were the water is cold for a minute and then gets hot for some time (and then cold again) without having to turn the knob (very high-tech stuff I tell you).
So the only reason why I stayed in the hotel was that because the payment was non-refundable. Definitely not recommended.