We really enjoyed our stay at Barbaros! The apartment is beautiful, exactly like the photos, and clean. For us - family of 4 - it was perfect because we had seperate bedrooms. Nice firm beds btw.
Location-wise it was good; we could walk to the main historical attractions such as the Blue Mosque and big bazar (a bit hilly though, you have to take that into account if you're not a fan of walking). Istanbul offers perfect metro/tram transport. The hammam Barbaros recommended was perfect (5 min walk from the apt).
Barbaros and his guys are great hosts; carried our suitcases all the way up, arranged shuttle service to the airport, explained everything about the surroundings, thanks for that! What I really liked was that Barbaros is 24/7 available for all questions etc.