I have had these shoes for over two years now. I have had problems with Teva's falling apart in the past. This shoe, however, far exceeded my expectations. A chemistry lab is filled with solvents and nasty corrosive things that usually eat away at the bottom of a shoe within a year guaranteed. These shoes held up on the bottom, however the stitching at the heal has gave way.

PROs:
-Comfortable shoe. I stand up 8-10 hours a day and do some moderate (1-2 hours) of walking in these a day
-sturdy. The hard rubber bottom is great for biking and hiking. Running not recommended
-waterproof. Neutrlize those acid spills before I lose my feet
-nice design

CONs:
-heal cushion can get crumpled up and doesn't keep shape. If I put my foot in wrong I will have to massage the cushion flat again or it jabs at my ankle
-heal stitching fell apart

Overall, I have loved these shoes. I would probably try a newer model as opposed to getting another pair of these just because of the heal issue, but I'm not sure if it has been addressed.