My son and I stayed there 4 days in July. The apartment is clean, comfortable and perfectly located in the trendy Palermo district. Diana was very quickly responsive to any questions/needs and was a great host. The price was tremendous value for money, maybe the best price:quality ratio of any of the dozens of places I've stayed in.
Only one very minor drawback is that it's on the second floor facing the street, and traffic can be a bit noisy in the mornings. My son slept right through it, but not me. However, when you're visiting a fabulous city like BA, who wants to spend their vacation sleeping in?
Would definitely stay there again!