Our stay at Alfredo's was great. The cottage is very nice, very clean and well equipped (and has Wifi contrary to what I read in the comments). The path to it is tough, but the view from the terrace is worth it!

Alfredo was very friendly, he picked us up on the first day and dropped us to the ferry on the last day. He gave us very advice for trekking in Vulcano and Stromboli.