In reply to Dark-Cloud:
I wrote the review but didn't get to use the boots much beyond when I wrote it up, what with the rubbish winter last year. So they've not been used all summer and when I did a winter route last weekend, I was wearing some B2 boots from the B2 review last winter! Once I get a few routes done this winter I'll see if the sole keeps crumbling and if so send them off for re-soling I guess.