In reply to Martin1978:
Hi Martin,
The TNF Chilkat is not a winter walking boot, it is more of an apres ski fashion boot, as you say down the pub sort of footwear.
It has a similar crampon rating to a pair of slippers. You'd be miles better off getting your Burmas resoled (try LSR, excellent service
http://www.lsr.gb.com ) than considering getting these - they're cheap but not what you're after.
Hope that helps!