Our stay was amazing. You can easily walk this from the train station, 16 minutes with backpacks and stopping for pictures.
There are five flights of stairs. If you have bad knees or lungs you may want somewhere else but if you can handle it. There are several great places to eat and drink at below! Walkable to really all of the main sights!
He has two A/C units so you can cool off.
He has many local tips and can help you get discounted trips. He was very helpful with our check-in as our train was delayed. I recommend Stefano's place!