I'm really happy we stayed with İlhan and Mesi. They are awesome, super nice and so friendly. We even spent the New Year together. The room is just perfect. Great place to work, good internet, a lot of light. Location is great. A lot of stores, 15 minutes walking from the sea, metro and ferries. And it's not so crowded as the center of İstanbul. I would definitely stay there again.
P.S. Mesi's persian tea is awesome.