Superb! I stayed with Marghe and Giacomo for three weeks in March 2014. Their apartment and its rooms are impeccably clean and well-ordered; all its amenities - kitchen, bathroom, fridge, wi-fi etc. - are excellent. Marge and Giacomo are quiet and polite hosts who'll do their best to help you with your stay. The apartment is ideally located: two minutes from the central train station, a street away from the entrance to Ballaro' market, and another street away to the intersection of corso Tukory and via Maqueda/via Roma - no more than 8-10 minutes by foot to the very centre of town. I can't recommend the apartment strongly enough. Incidentally, the chicken shop downstairs is incredible.