First of all I want to say that house owners are amazng and always did everything to solve our problems. If we had a problem with our appartement it has been solved almost immediately.
However the appartement itself had several problems with the most important one being the moist. As a person with asthma I've struggled to live there since very moist and cold conditions triggers an asthmatic attack. But house owners were willing to solve the problem the best they can and offered me a heater and advised to turn on AC unit so it helped to mitigate moist and cold part.
And we had couple small problems aswell like water missing for a day and broken AC unit, but in both cases house owners did everything they can to fix the problem so it was minor.
So if you need to stay as close to Taksim for couple days, this is a good option, its really close to main tourist street and shops, however If you have severe asthma this may be not the best place.