Room was clean although there was a general smoke-y smell, maybe previous guests were smoking in the bathroom, hard to tell. The location is good for taksim area, the street is not very touristy with many local food shops.
Hotel staff was very nice, especially the breakfast lady. We were staying there for a week and having the same breakfast plate every morning was slightly irritating though...
Sometimes (not for too long) the electricity or water would cut off and we were told that it was a problem of the whole area. Also wi-fi was a coming and going and some devices (we had smartphones, tablets and a laptop) wouldn't connect for no apparent reason.
Nice thing was that the towels were changed every day, our tea box and toiletries were refilled daily.
Overall I would say 4/5. Reasonable price and location, nothing too fancy and good for a budget trip.