I stayed with my family in Firat's place for 10 days. Overall, the experience was good but there is a list of pros and cons as follows:

Pros:
- Proximity to train station, Taksim, Galata, Bosphorus, etc. Lots of restaurants near by
- Friendly staff. Firat and his team were very quick to address our concerns or help with our further requests
- Safe neighborhood
- Early check-in opportunity
- Hearing Adhan (prayer time) from the place was amazing!
Cons:
- No breakfast provided as stated in the list
- Apartment locates on uphill which may not work for seniors or people with disabilities. To go to Galata on foot, you should "climb" uphill
- Not fully furnished. The refrigerator was mini and did not have 3 refrigerators (freezer, refrigerator and mini-refrigerator) as shown in the list. Additionally, only 1 mug for coffee.
- I would say it is ideal for two people but not more. Cuz I stayed with my parents there, I slept on the sofa and it may not be a pleasant experience for someone else.
- Noises coming from corridor when other neighbors open or close the doors. If you are noise-sensitive, you may consider it
- Shampoos, conditioners and tea/coffee supplies were not quite new, so I avoided using them.
- Finally, I believe it is quite expensive for what this place offers. I rented this place for early check-in option, but then when I check other airbnb options and talked to turkish people, I realized that I paid extremely high amount to this location and place. Although the place was as in the pictures but photos are more cheerful as mentioned in different comments. In reality, it looks a little bit dull.
I thank Firat and his team again! Hopefully they will consider constructive feedback mentioned above and will make this place much better!