We had great time. We discovered that we resided in low cost shopping area. We bought leather boots for $20/pair. We quickly learned how to walk to great places such as Ayya Sofia.
Ali was eager to help us. I would suggest they leave a Napkin box and a big bottle of fresh water on the first day.
For transportation we recommend Uber, metros, and yellow taxis with the T sign printed on doors because they belong to municipality and quite controlled. Other yellow taxis are crooks.