Eren is a very good host, replies very fast!
Also he guided me for high way taxes and parking lot( i came with my car and i had some luck to find a spot in the back side of the place near a 24h open shop, it was perfect so i parked there for 2 days, no problems)
The room is comfy, i came with my friends in december but it was very warm inside.
Its not a 5stars clean room, but it is a quiet place, near taksim square and You can find cheap shops near the place.( 500g tea 48 lira, 1 piece blacklava 8 lira etc)
I highly recommend Eren and the place.
I paid less than 250€ for 3 nights for 4 persons, for me it is a best buy.