Our stay was generally very good, amazing location right in the middle of a bazaar-like street, very close to most traditional markets (bazaars).
It's also very close to the main sightseeing locations and the tram (around 20 min walk including a steep hill).
Enes's father was very helpful and informative, he even insisted on helping us carry the bags from and to the taxi! Was really a joy talking to and interacting with him.
Other than that, there were minor issues which are not very important, and I'll mention in hopes to help any reader looking for extra details:
The three single beds' mattresses were not very comfortable (maybe they're old?), something to consider if planning a long stay with a group; there's also no water filter so you'll need to buy mineral water (or buy a filter).
And another issue which I found common in Istanbul is that the washroom tiles are slippery; pay extra attention when showering, especially that the showering area is too big that an anti-slip mat doesn't work.