Stayed in Malvasia room for a month, working remotely. Internet was great, fast, no interruptions, rarely lagged. Nice apartment in a great location, walking distance to basically everywhere. Awesome kitchen island that allowed us to cook on a daily basis without hassle. Incredibly welcoming hosts, always making sure we had everything. Very comfy bed as well. The view from the window was to die for, I miss that a lot...
Only a couple of small drawbacks - it's quite noisy (but it's Palermo, it should be noisy - enjoy that!). The AC was great to heat up the room, but due to the size it was really hot in one spot, and rather cold in another. The apartment is one of three in a bigger apartment, so you only have glass door separating you from the common area. Wasn't a big problem, but it could be if you'd require way more privacy.
It's been a great adventure to be there for a month and I would recommend going to Maurizio's place when you're visiting Palermo!