The Princess Apartment is on the 2nd floor, and the photos represent it very well. I loved the ambiance, turkish carpets, lace and all the modern appliances you might need, everything very clean and fresh. Wifi worked well, TV had only one satellite English speaking channel, BBC World which was fine for me.
The location of the apartment is just off Kumbaraci Ck, which is a great area. Lots of local shops to discover - in France I would call it a patisserie, fantastic cakes and bread; fruit and veg shops, a takeaway, where I got lahmahcun for 2TL, absolutely delicious, just on the T junction at the bottom of Kumbaraci Cd. The tram into Sultanahmet is 2 minutes walk downhill, Istiklal is a steep walk uphill on Kumbaraci, though there are several restaurants and coffee places en route if you need to take a breather. I recommend an Italian place Morro, as the seabass salad is amazing.
Mehmet is a great guy, who will introduce you to the area, and even organise a tour for you I think. He speaks several languages and was a great host.
I love Istanbul and when I return hope I can stay here again.