Everything was perfect...until the check-out which left a bitter taste.
The flat is very well located, in the dynamic part of Istanbul and not too far from the touristic part neither (25min walking).
We were 6, which is I think the best for the apartment (3 bedrooms); it's clean and cute and the roomes are quite big, except for the kitchen if you expect cooking there (for breakfat only, it was really enough for us)

On the other hand, we had difficulties for the last day and check-out.
4 of us had asked for a transfer to the airport at 6.00 on morning. Evin arranged it for us so we had no contact in case of pb... The taxi ever arrived and after waiting for 15min, we had to decide to go to the airport by our own and arrived at the very last minute to catch the plane (probably not Evin's fault but maybe having a phone number to contact the driver could be a good idea...)
And the last 2 others had planned the check-out at 12.00. But nor Evin or her friend bothered showing up (she was not clear about that!), only the house cleaner who didn't speak a word of English and was unable to tell us about what to do with the keys or the money we still owed to Evin... Another loss of precious time before going to the airport!!

At the end, we spent 4 nice days in Evin's apartment, but we would have appreciated the good organisation until the last day...