I like the Zirra model better. After a few weeks of use, I can say that the ankle strap digs in after a while, and if I loosen it up, the sandals seem big, so I have to constantly adjust them. The strap over the toes doesn't have a large enough velcro strip to tighten it, and the little piece that actually can grab onto something, has given out after a while, so it comes loose constantly.  So the only strap that I can comfortably work with is the middle one. I wish they added a longer velcro strip to the toe strap, but as it is, I am sorry I spent the money. I would have bought another pair of Zirras instead.