I have a pair of Exustar SM450 which appear to be the predecessor model. I only used them for one winter as I found the rubber used in the soles was too slippery. They were also akward to walk.
I then switched to a pair of Northwave Gran Canion 2 GTX.
http://www.northwave.com/en/product/_grancanion_2gtx
Great shoes. (But I maybe should have gone a size up as their snug on my pinky toes!)