We had an awesome time at Güner's apartments. Güner is only moments away from anything you need. We stayed for a week in Istanbul and had a few fiddly things to deal with, and he was easily contactable and helped us straight away. The place is more than comfortable - it looks just as in the pictures. There's a grocery store, bakery, etc, right downstairs, so breakfast was really convenient. It is a bit of a walk from Taksim Square - 10 minutes or so, which was a little annoying with our huge backpacks when we came/left, but the apartment was quiet, modern, spacious and clean, so we can't argue. If you're using public transport to get around, note that it's a little bit of a walk as well (unless you use the buses, which we didn't). But this is Istanbul - you'll be walking everywhere anyway. We'd happily stay here again if we wanted to stay in this area of town.