I stayed at Nikki's for just over a week, and although I never actually met her, her flatmate was really lovely.
However, the room does not have an en suite as advertised - the bathroom is for sole use, but it is through the other side of the kitchen and only has a frosted glass sliding door. It can make things a little awkward if the kitchen is being used while you're in there!
Also to note, the apartment is currently up for sale so there were viewings happening throughout my stay (one time with less than an hours notice!).