The canisters are not very sturdy and if they fall on the floor they break easily. Not refurbished, just used. I only used a few of the shelf liners ad the wont hold anything heavy but they do provide shade so this works perfect for me. :D I up my starts to 3. The company indicates in their info that it is to be used as an indicator of infestation areas and levels, as well as a partial remedy by trapping the males before they breed further. These came very quickly and they work perfectly! A lot of people ask about the narrow vs regular fit. I broke my first pair in at a conference in San Diego, where I got 25 miles of walking in that weekend, with my feet feeling great. Shipping was great, came exactly when they were scheduled to and were packaged well with no damage to shoes or shoebox (I like to keep my nice shoes in their original boxes so happy that the box is cute and undamaged). I wear a size 71/2 in womens and I could fit into them with it slipping off my foot.