Artan's apartment is just as described and we really enjoyed our stay.
It's roomy and comfortable with plenty of space for our group of five. Like most apartments in Italy, it's on the first floor and there are about 15 stairs and no lift.
It's in a great location, only a couple of blocks from the Duomo, but is remarkably quiet once you enter the big green door. We were delighted to find the apartment was stocked with a big bowl of fresh fruit, milk, water, coffee and some basic toiletries. When we said we needed to use the washing machine, they went to the supermarket and bought doe washing powder for us.
Artan kindly met us at the station and drove us to the apartment and his friend showed us the ropes.
We highly recommend Artan and his apartment.