The place is very clean and the hosts are very helpful and friendly and always ready for you if you need them.
The view is phenomenal; nothing matches the experience of sitting in the balcony, drinking coffee and watching the ships and tankers pass through Bosphorus canal at close distance.
In the main bedroom you can watch the entire canal while laying down on your bed.
The only downturn is the steep ally that you have to climb to the building if you want to walk back to your place from Besiktas town center BUT it is totally worth the climb.
All in all i am sure you will have great unmatched experience.