I love my crocs and wear them during the warm months of the year.
They are also not good in the rain.
I wear socks with them and give them a good soapy wash frequently. Never had any smell issues.
They are great for traveling. They pack well and are easy going through security. Last year in Aruba I was pulled aside for secondary screening and they took my crocs to dust for explosives. I thought that was odd. I would never think of putting explosives in a pair of holey shoes lol.
My foot doctor recommended them and told me that Crocs have good arch support. When it rains they get a little slippery and my feet get wet. But they do dry pretty quickly.