Pros: location is perfect, super close to the main street leading to Taksim. Clean, lots of space, easy to get to. Above a bookshop, which is lovely if you want to purchase something. A/C worked great, too! A plus for is was that their sweet cat greets you every time you get back :)
Con: because of the location, it gets very loud at night (especially 11-2 am) with cars blasting music and even honking as they drive by so if you are a light sleeper and want to sleep earlier than that time, this may not be the best choice.