I would highly recommend this place to stay if you visit Istanbul by any chance. The location is just perfect, 3 minutes walk and you'll be in Sultanahmet park (Aya Sofia, Sultanahmet Mosque) and if you walk 4 minutes to the other side you'll have the greatest view to the Bosporus.
The room is nice and cozy, just as described. More importantly it's super clean everywhere in the house.
I'm working online from home, so I can say internet works well.
The host is nice, always ready to help.