I tried a pair on yesterday and even though i didn't get to road test them, they are pretty damn impressive.  The layer of 'Stealth' rubber around the toe is as grippy as you would expect and I can't wait to try a pair for buildering.  There's a half decent edge that is very firm and precise.  I often find that trainers have too much give in the soles to give good grip on small footholds, but these shitkickers will be ideal.

Hopefully, as well as being excellent for parkour, this will be an ideal parkour/buildering shoe, giving excellent grip during the ascent and enabling you to move around quite freely once you've topped out.

Unfortunately they're only available to me in a size UK9 at the moment (I'm a UK10).  Hmm.  I wonder if I can post a pair to Canada…