I've had these for about a week now, and I love them!
As I see it, they're great because they're half-sandals, half-proper shoes. All the advantages of crocs, but smart enough (and normal-looking enough) to wear day to day. I wear mine at work! (My trousers are long enough to cover up the fact that I have bare feet...)
The only real downside is that being leather, the tops of the shoes might be damaged by water. (But I don't really care about that, as it's no different from any other leather shoe.)