We had a great stay at Erol's place. The apartment is nice, clean and well furnished, and it gets a lot of natural light. Erol is a helpful and accommodating host and both check-in and check-out were very easy. I would give a word of caution though, if you have trouble falling asleep when there's noise outside: the apartment is located on a busy street with a lot of bars, and it can get loud at night. That's the downside of such a convenient location in Istanbul. But overall I would highly recommend staying at Erol's!