Great experience. Be sure to get there early as there is a significant amount of paperwork to complete before heading out. And make sure you get the quick lesson in riding! Vala was a lot of fun; all the employees were very nice!
Location of scooter pickup was farther away from central Ibiza than was expected, and we didn't get 125 cc scooter; they gave us 50 cc scooters because they claimed they didn't have any more available (although they did). However, they were very helpful in getting us setup and how to operate the scooters.