Simply the best.
First, the property. The location couldn't be better - in the old center of Alcúdia and literally only 25 yards from the main walking street, but on an amazingly quiet little side street. The space is recently remodeled, decorated beautifully, and has all the amenities you would want. In short, it's great.
Now, the host. This is what puts this listing in a league of its own. Valentina is amazing. My wife and I use Airbnb fairly often, and she is easily the best host we've ever had. She has years of experience in the hospitality industry, and it shows. Ridiculously responsive at all times, anticipates your needs, is always available without hovering, has suggestions if you ask but isn't pushy about them, and is just generally a really friendly, helpful person.
We will 100% stay here next time we visit (or in Valentina's other property in Pollença), and whether one of those is available or not, I plan to try to get together with her for a drink or bike ride. Truly a wonderful experience.