I bought an older model of these a couple years ago, (same flip flop but without the awesome tread), and they are hands down the most durable sandal I have ever owned. I literally wear these flip flops every single day. I work in them, play in them, hike in them, and I put these flip flops through more use and abuse than they probably are intended for. I love the arch support, that is a very big plus, especially since i walk around in them all day long.
One thing to note, when i first got them, for a few days the top of my foot was rubbed raw from the tightness of the webbing. However, my feet have high arches so the top of my foot sticks up higher than average. After a few days it was fine (all shoes have an initial "break-in" period). Its nice because even though the flip flops are now broken in, they are still snug, unlike a lot of flip flops that get loose over time. So, if you can just bear through a few days of discomfort, you will have the best flip flops of your life.