Yakup will make everything to have a great time in Istanbul. Just ask him. He's a great host.
Otherwise the property is okayish, with an excellent value for price. It's in the backyard of a good neighborhood, every highlight of the Old City is within 10-15 walk, also the tram lines, supermarkets (BIM, Șok) and good restaurants. It's not the place where you will linger in the balcony with a coffee, but where you go home to have a shower and sleep. For that you'll have 4 comfortable bed, conditioned air and silence.
It's in the middle of the traffic chaos, so be prepared that you won't be able to park at once. Better sync with Yakup before you arrive. He will help you to find a place.
And something completely different: the tram ticket kiosks. You can buy 1, 3 or 10 ticket bundles. But not at the same kiosk. One kiosk, one type of ticket. 10 ticket bundle is the cheapest (per ticket), but you have to find the dedicated kiosk. Quite insane.