If you have the Inglesina portable chair, the tray is a great addition to have. It helps contain the food for messy babies. It also gives you a clean surface when eating out. From experience, the best way to attach it is to snap in onto the table handles of the seat before securing the chair in place. Because if the handles are tilted in just a little, you can't get the tray on. If you do that, it will fit perfectly.
ProsContains food. Clean eating surface
ConsA little bulky to carry into restaurants, but worth it.
Best UsesHome, restaurants, anywhere you're invited to eat that has a table.