Bought my first pair of Crocs recently, after thinking about buying a pair for years and years.  They certainly are comfortable, although I find without socks my feet get a little um, moist, inside the Croc, and I tend to slide around inside the shoe bed.

The sizing was a bit of an issue; I didn't heed the advice to try them on in a store first, and just purchased a pair online.  I'm a solid ten, but since many reviews mentioned buying a smaller size, and Crocs sadly don't come in half sizes, I went for the ten.  They are decidedly large, although wearable, but I have tripped a few times, and I find the wider toe has the potential to trip me up as well.  I have  some ambulatory issues to boot, no pun intended, so I really have to watch my step when wearing the Crocs outdoors.  I have taken to just wearing the Crocs around the house, but that's fine.  In the end, I also recommend trying a pair on for proper sizing first, before buying online.

Best part, totally washable in the sink or shower, and air drys in minutes.  Aside from the fit, I'm giving these shoes the total big five stars, for general all around comfort, maintenance, longevity (yes, although I haven't had them very long, I bet I'll still be wearing them in 5 years) and low price.

EDIT:  Now that chillier weather has set in, I'm wearing socks with my Crocs, and find the fit is better, of course, and less sliding around.  I still like them, and will get another pair, in five years or so, when these wear out.