I know this is a great product.  I've had a set before.  I have to knock off a star because a part was lost during shipping that renders the product useless.  The product comes in a clam shell package.  For me it shipped with some heavier stuff that impacted the package and let it open some.  There are two retaining clips that slipped out and since the main shipping box wasn't fully taped up one slipped completely out of the box and is probably on the floor of some warehouse or truck somewhere.  I found the rest of the small parts in the box and the larger parts still in the clam shell package but without the one retaining clip the system is useless.