If they sold these things in 5 packs I would buy them and hand them out to friends and family.  Whenever people see us using it they always make the comment that they need one.  We always seem to leave one somewhere so having an extra one on hand is a must.  The only thing I've notice with the Sport model is that a standard tennis ball fits a little more snugly and can sometimes be harder to pick up if the ball is muddy.  Next time we will stick with the Classic model.