Best location very clean very comfortable good brekfast and the staff excellent.Whenever i am going to this hotel.Simply the best

Hotel is excelently located - it is in the city centre, 5-mins walk from Hagia Sophia & Blue Mosque... Staff is friendly and rooms are not big, but quite cosy (clean & with all you might need for a short stay). Internet in the hotel lobby is free of charge but it doesn't work as it should (at least, it did not function for me!).
One remark: bring a book when staying in the room during night, since all their TV channels are in Turkish (only 1 is ocassionaly without sinzhronization).
Food is excellent (we did have only breakfast but you should try their cheese & cheese pies; jymmmuuuuuu!!)....

+: located near main spots.
-: the wall is very thin, so I can hear everything what people are talking about in the next room.

Stayed in Ersu with my mother for 6 nights. Bedroom is a small, and beds could be better, but furthermore it's a nice small hotel. Good breakfast with bread, cheese, olives, eggs, sausages, yoghurt, dryed fruit and cereals. Towels are replaced every day, which is unneccesary: take care of the environment! Located in a cosy, small street with a nice restaurant for lunch/diner at the corner, Hotel Faros. Near all highlights and public transport to Eminonu/Galatabridge.
For the airport pickup, suggest you to contact BackpackersTravel in Istanbul. Good company, good price and safe!