I wouldnt say they are "cool". they are a fad going around right now, though. i think they are the most ugly shoes in the world, but i have to admit, that after borrowing a pair from my friend, they are the most COMFORTABLE shoes EVER!!!
also, why should it matter if they are cool or not? If you want to get a pair, get them. its summertime anyway, so no ones going to see you wearing them in your backyard, if thats what youre worried about.
I say get them. you dont have to wear them all the time, but they are nice to have on days where you need something comfy to just throw on that will match your clothes!!!
also, if you want to save money, i know that walmart and many other stores selll shoes that look exactly like crocs, but dont have the crocodile on them for like 8 bucks!!!! why buy something becasue of a crocodile?!?!?
Hope this helped!