Atabak is a great host. Very responsive and helpful. We stayed in his place for almost 4 weeks and were very happy here. The apartment is nice and has everything you need. Wifi was a bit spotty sometimes, but I'm sure that'll improve. The location is a bit further from the tourist places like Besiktas or Galata, but there's buses and dolmus (shared minivans) stopping in front of the door. You can either take the bus directly to Besiktas, or hop off at the Levent Metro station and continue with the Metro to Taksim or Galata. All easily reached within 45 minutes! The big plus is that you're staying in a more local neigbourhood with a lot of welcoming people and als more 'local' prices ;)