Irem's apartment is exactly as described, if not better. The bed is so comfy we found it hard to get up every morning. Cleanliness is intact, bed linens and towels in perfect shapes. Location is also good as it is within walking distance to Istiklal Street but still in the quiet neighbourhood away from the hustle and bustle. Communication is also good because Irem is available to answer your questions via text messages most of the time. The only drawback is we stayed on the 3rd floor and there's no elevator in the building, so it took some effort to drag our heavy luggages up, but hey, it was all worth it so no complain here! :)
We definitely recommend Irem's place to anyone visiting Istanbul!