I bought my crocs recently thinking the clogs would be good for my overseas travel (15 hours on a place = SERIOUS foot swellage...last time I ended up barefoot in LAX because I couldn't get more than my toes in the shoes I had with me!!). I bought them because ALL of the nurses and techs at the local hospitals wear them... partly because of the anti-microbal stuff, but also be cause they all swore they were the most comfortable shoes if you are on your feet all day.
Yes, they are bit on the 'ugly' side...but I figure they are no worse that the multi-coloured teva sandals or birkenstock clogs (which I used to have too). I even think they are more comfy than my birks.
I have the red ones like the picture posted earlier (with the holes). I love the fact that the heel strap can be flipped up over the top, so they end up looking like clogs...but the strap can be slid on to keep them more firmly on the feet when riding roller coasters

I love the holes because with every step, they seem to suck air in under and around the foot...very cooling. I've worn them in the Australian summer and have NO qualms about wearing them at WDW in July (it's hotter here in summer..and my feet were still cool).
All in all...I love mine and would recommend them highly. I'm going to purchase a couple more pairs when I hit the states (they are about $20 cheaper over there...even with the exchange rate). Hmm...think I'll go for nice and versatile navy blue and then a fun bright, ducky yellow colour

I hear they make them in several styles, including flip flops (thongs for any Aussies reading this
Cheers...