The flops are too thick on the bottom for me and I'm a big guy. I prefer flip flops that feel like you're walking with just your feet. I used to have Teva flip flops and they weren't that thick at the bottom.
Pros
They should last longer than most sandals. Including reef mark. Too bad there is no opener.
Cons
Flip flops may not be appropriate for those with wider feet or a different foot shape.