My almost 5 kindergarten son is still happily strapped into his Britax Wizard in a 5 pt harness on an everyday basis. But the thought of lugging that thing around the airport again... Sooo...I'm thinking about getting the Compass folding booster to use in the rental at WDW in a few weeks, then leaving it at my Mom's for the random occasions he's in her car. Has anyone had any experience with this seat? Good or Bad? It looks like it'll be easier for the airport since it folds.... TIA for any opinions!