I stayed at Anıl's place for 1 month and for a budget traveler I think it's 5 stars! Anıl doesn't speak English, but it's easy to communicate with a translation app. He is at home most of the time since he works from home. There are 2 cats: Azer is a very nice cat that will often come to your room and lie on your belly, while Maya will scratch you if you pet her too much.
The internet connection is great and it's a walking distance to Kadiköy. I went there every day to pick up a vegan Dürüm at Rulo Lezzetler for 2 Euro/USD which makes you full the whole day. I also recommend Meyve Dünyası where you can get a fresh juice.
Overall, a great place to stay in as a budget traveler who doesn't need anything fancy :-)