Small yet nicely renovated apartment. Location is fantastic- close to shops, restaurants (rumist cafe recommended) and all main attractions (blue mosque etc).
The airport transfer was excellent and the manager (Kubilay) was great - even coming out late at night when we had issues opening the door (lock got jammed).
The only negative was the wet bathroom (shower and toilet together). This causes the whole bathroom to become wet during a shower.. Takes a while to get used to! Also the roof is quite low in some sections if you are 6ft+
All in all.. We had a enjoyable stay. Istanbul is a fantastic city!