I had an excellent stay at Tatiana's and would absolutely recommend her place for anyone looking for a place in London.
Her flat was beautiful--the pictures don't do it justice--designed with an artist's eye, and impeccably clean.
She was communicative and friendly as a host, from check-in and throughout, and also allowed plenty of space and privacy to me as a guest.
The location was great as well--right off of Holloway road and Seven Sisters, so very close to the Picadilly and Victoria tube lines, and loads of buses. There were also numerous pubs, grocery stores, and even Finsbury park nearby.
All in all it was an excellent value and exactly what I was looking for during my stay in London. I strongly recommend staying at Tatiana's!