Overall experience is ok. Not place if you with very small child (until you travel with buggy). Very steep hills around. Entrance into the building is not perfect if you carry buggy or heavy suitcases or have disabilities. Flat is clean enough, shower is ok. Kitchen is very good also. Taksim is quite close, but you need to walk all time uphill. There are a few fast food places around, but not many.
Main issue is the noise - if you don't sleep well with the noise - not for you. Bedroom is sleepable somehow regarding the noise, but living room no way.