We had a lovely time in Istanbul staying at Mesut's flat.
We are a family of 5, the flat is definitely more than enough in terms of space and very nice, we got a lot for our money (washing machine, heater, towels, washing powder, soaps and more) so we felt at home,. Mesut contacted us the next day to see if everything is fine, he is very reliable. The waking distance to Taksim square is 8 minutes.
Over all it is a very good flat and very good host, and good price too.