I got a free sample of this product to review. But these are my own opinions. 

I used this kit to hang a 16 pound piece of metal artwork. Works great. You just weigh your art, then add up how much load each strip can bear. Be sure to use enough strips to bear the load, and maybe an extra for good measure. 

There are enough strips to hang multiple art pieces so I guess I better be on the lookout for some new things to hang.