Isik's apartment was great! located in a perfect position (super close to Taksim square), it was cozy and clean. He provided us towels, bed sheets and everything we needed, also the public transportation card that turned out to be vital.
He picked us up somewhere in Istanbul where we were left by the airport shuttle bus due to the protests of the 1st of May and then he gave us useful directions for the city. Overall we had a great experience and we will definetely go back to his place for another trip in Istanbul.