Everything about the place is good. To start with I can tell that they were extremely helpful during our check-in as we arrived past midnight and new to the place they helped by arranging a taxi to their place and helped us carrying our luggage to second floor.
The place had just everything one would need iron table, iron box,cloth drying stand,washing machine,dish washer,crockery,ac, toiletries,extra pillows,hair dryer,microwave,kettle etc etc. You name it you will have it.
About the location I would say that if you are visiting Istanbul for first time then initially you will have a little problem in understanding the way to reach the main tourist attraction.Though Mr.Guner was very helpful in explaining us where and how to go we had to struggle due to language problem but once you catch the way this place is convenient in case of conveyance.
Breakfast was good.Some supermarkets are close by.
As I know Istanbul quite well now,I would definitely prefer staying at Berry during my next visit.