Tolga's place was in a perfect location to enjoy a busy part of Istanbul. The apartment was a cool place to hangout and work. The wi-fi was really good so perfect for those who work digitally.
If you plan to cook a lot, then the only down side was the fact there was only one cooker hob, but there are a lot of places close by that you can eat at and they are very cheap.
Tolga gave good insight into local places such as where to get a negative covid test. For this, get a taxi to the Sisli Etfa, which is 10 mins away and costs about 20 lyra. Go inside the main building and pay the 250 lyra for the test and they give you a piece of paper to go outside to the testing building (about 50 metres walk). You have to get the test one day and then go back the next day for the printed results, so bare that in mind.