Nida is an excellent host. She will be there to provide help when needed as well as the people that work with her. Another good thing is that she is a tourist guide, so event if you're not doing the tour with her she can provide excellent information on what to visit when coming to Istanbul for the first time. It was a great experience. Regarding the apartment we really enjoyed our stay. We were four and we were comfortable. The apartment isn't huge but the right size and very cozy. The neighborhood isn't what you would expect but there's nothing to be afraid of and the positive thing is that you're very close (walking distance) to taksim square and istiklal avenue. What else could you ask for?