Can't say enough about how great these shoes feel.  They are super stylish as well.  Total score.  I wear an 8.5-9.0.  Ordered mine in 8.5 and they have a little bit of room to spare, so if you're between sizes, I'd suggest you go down a half.  I'll get more in different colors, and re-order the green/yellow wear these wear out.  They're just that awesome.
Edit:  Just returned from 3 days of hardcore walking in these shoes all over Disneyland (much of it w/ a 38 lb. toddler on my shoulders) and my feet were totally fine every night.