We have been coming to Dentoni for about 8 years, before they were located at their current site. The PLUSES are that it is a very modern building with a large area for seating and a an absolutely gorgeous view of the beach at Torre dell'Orso. They basically serve pastry, drinks and ice cream. You go to counter and pay for what you want, then you take the ticket to the food counter.
We have always been here in April, late September or October when it is not crowded. In spite of this one of the common traits each time has been that there may be 6 people behind the counter chatting with each other, and NO ONE rushes to serve you.
Oh well the gelato and the view make up for it!