The Host:
Mehmet did a great job as a host. He provided us all information we needed to get to his apartment and we found everything as described and seen on the photos. Whenever there were any problems (how to get around or questions regarding the flat-equipment) we could contact Mehmet.

The Apartment:
We stayed in the apartment with 4 people and it was all very convenient.
The kitchen is well equipped if you want to cook, an AC provides the right temperature and the internet helps you get along while planning your trip. The area is very close to all sights on the European side (Beyoglu) and all good places to go out for food or party. Although in the city center it is a very quiet neighbourhood. A supermarket and a night-shop are very close by and on sundays the whole street transforms into a huge marketplace where locals offer food and clothing.

The City:
You have to experience Istanbul which is a very vibrant city full of contrasts between European/Asian and Western/Traditional lifestyle.
Make sure you catch a view of the famous mosques, palaces and "hidden" sights the locals can recommend you.

Overall:
Visit Istanbul and visit Mehmets apartment. He made our experience a great one and I already recommended him to all of my friends.