I have had them for over 1 year. What I have to say is the following:
Their material is incredibly durable. I weigh 95 Kg and they haven't suffered the slightest damage. Usually flip-flops wear out quickly for me.
They don't slip, neither on the floor nor on the foot inside them.
They are lightweight.
On the other hand, as for the negatives:
Their size is slightly smaller, so they narrow the foot a little. It's better to get them one size larger.

After some time, I realize that my feet hurt when I wear them. Their plastic is of poor quality and quite hard. Also, they are very small in size. You need 1-2 sizes bigger. Never again crocs.