Ndidi is a gracious and highly communicative host. She responded quickly to all communication and was very personable, and yet created a perfect sense of privacy in the shared apartment.
The apartment has exactly the features described, and I have to say the bed was sizable and extremely comfortable ... in some ways I slept better than in my own at home. The bedroom was immaculate, and had some nice touches like convenient power outlets, a standing closet with plenty of hangers, and a dish of chocolate eggs. =)
It's fantastically located: I hit up virtually every tourist location you can think of, went out to dinner every night and simply walked home most times. If you like walking, you can get to the British Museum or Covent Gardens in a 10 or 20 minute walk, or just take the Underground or a bus ... nothing was more than 20-30 minutes by bus at the outside, more often 12-20, and that counts from starting inside the apartment.
There are some considerations as well, particularly for travelers from the U.S.
For "seasoned" travelers or individuals with joint pain, it is up a couple flights of stairs with no elevator, and being an old building, the interior hallway is quite narrow, barely more than the width of a standard doorframe. In the bedroom, there is perhaps eight inches between the foot of the bed and the wall with the (high quality, flatscreen) TV, and only enough space on the sides for the short side of an unopened suitcase to lie flat (maybe 18"?). You'll definitely need to think carefully about how to arrange and access any luggage you may have brought with you.
As described, there is no air conditioner and the apartment is quite warm. I kept the bedroom window fully open the entire time (early June) and the bedroom itself was comfortable, but I couldn't see a visit any later in the Spring/Summer than this. There is also not a functioning bathroom fan, so with these two things combined don't expect to take a hot shower and go anywhere right after without allowing a while in the bedroom (windows open) to cool down and be able to fully dry off, especially if you're walking right afterward.
Lastly, the bedroom has a latch on the inside, but you can't lock it when you leave. I had no reason to be concerned by this, but some might.
All told, it's a great location in a quiet neighborhood, and you can't ask for a better host than Ndidi. Stay with confidence.