In a nutshell, I’d recommend this place to everyone who prefers living like a local in one of the brightest Istanbul areas to standardized hotel rooms - perfect but boring.
It’s a very cozy flat to stay with everything needed for 1week trip to Istanbul: kitchenware, ironing stuff, washing machine shared for two flats. It’s very clean, warm and, which is important, sound insulation is more than okay for old building.
Balat area is a separate topic: it’s safe, full of good places to have breakfast or coffee break (but not noisy clubs/bars) and fulfilled with all the colors. Leaving home in the morning and coming back in the evening you will smile and catch the vibe just walking down the street.
Based on my personal experience, I can also tell that even if you have minor concerns or questions, Enes will react and helps you immediately.
Me and my wife had an amazing week here and felt like home, will be happy to return.