We stayed four nights there with my boyfriend to visit Istanbul. We were able to check in by ourselves thanks to the good indications of Levent before our arrival. It was perfect to us as we arrived quite late.
The place is nice and comfy in a discrete quarter, we really appreciated it, it was as expected for such stay. As well for Levent who kept himself available by message in case we needed help. For instance he adviced us on how to get to his place from airport Sabiha. We knew we could rely on him if necessary, felt good.
Only minor point if I had to point one would be that the place is a bit far (for us) to the main points of interest in Istanbul but it is sincerely manageable with the marmaray and bus.
I recommend this place if you look for a simply nice place where to rest after long days of discoveries in the big Istanbul. :)