I wouldn't call it a loft. It's just a simple, used apartement. We arrived in a dirty flat, but Fernando hired a last-minute cleaning lady. We had to wait till she was done and lost our first evening in Naples. The furniture is obviously older. Stains on the bed, the shower head surprised us with a stream of water in one direction and another one in the opposite direction. Which was kinda fun.
But the bed was comfortable and the aircon (after fernando fixed it) worked well to be able to sleep perfectly. We didn't use the kitchen, cause there are not so many tools to cook properly.
The TV didn't work. The port (bus to airport) is super close, but the train station is quite far.
If you plan to walk around Naples the whole day and eat outside, this apartment is good enough. Nothing special, not super big but you get good rest in this bed.