Perfect views from the terrace and excellent location (metro station, Istiklal street, Galata tower and even Taksim square you can reach by foot)!!!
The rooms are small, you can see it on photos, but it was not problem for me because I stayed alone (you should take this into accont if you are staying couple/have a lot of luggage).
Staff on the reception is very friendly and helpful, thanks a lot for early check in!
All in all: good price/quality match, I recommend this variant of accomodation.