This is a great product, except for one thing - - - the hubs of the wheels (which ride on a steel axle) wear out very quickly, making the wheels very wobbly, causing them to rub on the cart housing. The cart is a great concept, but the wheels are pure, flimsy plastic junk, and make the cart virtually unusable. (I don't think 3 years of seasonal flower bed tending, on a city lot in Ohio, would constitute "extreme usage". . . . ) Very disappointed in this obvious design/manufacturing flaw, especially from a company we've bought from many times in the past, and have been very happy with their products.