 The only tiny bad thing I could mention was being woken up at 4 15am by extremely noisy people outside the room but this was not the hotels fault However I would say that fitting door closers on all the doors would be helpful as u had to stop the doors from slamming every time u opened them 
 The location for our visit to the O2 was fantastic as it was a few mins walk to both the cable car and the tube The bed was extremely comfy The breakfast was amazing with such a huge choice you could have literally stuffed your face We would definitely stay there again 