they seem to be a bit harder (for durability i suppose), thinner material, more dense, and fit a little smaller than my work crocs, also sz5 - a pair of roomy 'specialist vent', endlessly comfortable. i'm a size 5.5 as my feet are fairly wide but sz5 in length. tried a 6, but they were a bit like walking around with boxes on my feet!
perhaps they'll soften up with wear. i can tell they won't be dreamy straight away. shin-digging is an issue when going on a slope or steps!
they are nice and light, and they fit well enough for me to keep, quite easy to put on and take off. i just hope they'll soften up, seems possible. still, i'd rather wear these than typical wellies that flap heavily around my legs. i like the look of aigle boots, but they're expensive and have a narrow fit, not good for feet.. i'm into this whole natural foot spread thing :)
sole traction ok, not very non-slip when tested on wet paved garden path. would be fine on tarmac though.
overall, that they're light and wide make them good.