Our time in Istanbul at 'Urban Blue' was enjoyable, spacious and comfortable. It is a fantastic location, giving you a great base in the Beyogiu district (Galata Tower, Istiklal Caddesi and Taksim Square) and easy acess to public transport across to the old districts (Sultanahmet & Eminonu).
Doruk was away when we arrived, but he had arranged for us to be meet by his friend, who made us feel welcome and explained everything to us.
This is a lovely, well appointed unit that I would be happy to recommend to other travellers.