Dear Mai, thank you very much for being such a nice guest, it was a pleasure to host you and your family. I just wanted to clarify your comment about the location.
We are exactly in Kireçburnu neighborhood, even though it's more fun, personally I don't prefer the commuter ferry option for daily commuting because the ferries are not frequent and it's much slower than the subway, even than the bus... If you take a commuter ferry from the Old Town and come via Sariyer, it will take about 90 minutes to arrive, that's correct. But we are very well connected with Istinye by minibuses and buses; getting off the ferry in Istinye instead of Sariyer would save you about 25 minutes.
It's possible even to get to Atatürk Airport in less than 90 minutes by public transport.
If you use the subway + minibus combination it will take 45 minutes to Istanbul Old City from our place. If taken out of the rush hour bus #29C will take about 25-35 minutes to Kabataş just a few hundred meters from Taksim Square. Bus may take much longer during the rush hour though, so (Hidden by Airbnb) Maps will always help to find the best option.