I had to go above and beyond to get a pair of these. I found that size 42, which is billed as 11-11.5 in US sizes, was too small for me -- I am a US size 11 virtually always. I ended up ordering from amazon.de to get a size 43 at all (thanks to Astrid for help on this!). My pair (in navy) arrived last week and they are fantastic. I would totally order more in NAS if they had my size!
I don't think the Caspians beat my Eccos for comfort, but they are very comfortable. (BTW, if you are looking for fantastic arch support, I recommend Ecco's Chase II tie, pictured below. Not, alas, in the NAS, but available at Nordstrom.)
For the record, I have a medium-to-low volume, medium arch, medium width foot.