Ugur was very helpful and responded quickly to our messages.
The best thing about the apartment is that it is comfortable enough for 2 people. It has all the necessary accessories and is very well located, although I highly recommend looking into the cost of a cab from any of the airports to the apartment address. Cab drivers get desperate to overcharge by taking alternate routes all the time, and don't blush at all when you bring it to their attention. The cost of an Uber Taxi from Sabiha Gökçen Airport is 340 Turkish Liras (October 2022) and expect a very bad face for not being able to get more money out of you.
About the apartment the most "complicated" thing can become the stairs, the steps are high and you have to be a bit fit to climb them a few times a day. Also keep in mind that walking up to the Galata Tower is a steep climb. The person who wrote "It is a 2 minute walk to the Galata Tower" must have a couple of Olympic medals in 100 meter flat.
As small details, you have to strain a bit to turn on the bedroom light, and the spare sheets are under the bed in the domitorium and the couch in the living room.
TLDR: I recommend it if you feel in a good shape (it is not for older people for example).