Instructions for check-in were fine and clear. My family was not too happy with area as at night they could hear some disturbance outside the building. The place had clean bed and shower, but there was dust literally on every surface. Floor was dirty too. I guess you can see the comments on my profile about all Istanbul stays they've had so far and there never was an issue. I book approximately same priced stay every time and on a contrast to previous places this one was lacking.
Eren was easy to reach and pleasant, but I hope the cleanliness could be improved.
All in all it was 3,5 out of 5, especially when you have what to compare your experience to.