We stayed at Marjolein's place for a month. She's a super host, and will go out of her way to make sure you have a great stay.
The apartment is located right in the middle of the old town, with loads restaurants, cute bars, and tiny design shops around the corner. Getting here from the airport is super easy with the bus, and the train station is a 15min walk away.
We worked remotely while staying here, and Marjolein provides super fast internet (>50Mbps; good upload speed too). The WiFi can be spotty, but she installed an ethernet cable (and bought a USB-C adapter to accommodate us), so for computer use you should be sorted. There are two desks, a kitchen table, and we used a cupboard as a standing desk. No problem for two people.
Kitchen is well equipped. No oven, but stove works fine. The apartment is fairly basic overall, but super value for a longer stay.
It's in the middle of a vibey area, which is definitely a plus on the balance, but it does mean that it's quite noisy sometimes.
Personal tip: go to Buatta (the restaurant just around the corner) for an excellent introduction into Sicilian food, and Colletti for an after work drink and a vibey environment.
Overall we had a great stay.