In reply to Durkules:
Yeah, i always thought the heel was shit on 5.10s, then i tried some boreal storms with a special "grip" heel and found them even worse! Basically, there is a technique to using the 5:10 heel, you just have to place it right, you can use the rear seam and even n some extreme cases the little extra bulge of material can be "hooked" onto a small lip or pebble and suddenly become massively advantageous. weird, but it has worked for me at times!
Adendum: i have never been able to afford to try out sportivas. Many people rate them. it took me loads of tries before i managed to get 5:10 sizing right (1.5 down from street size for me in velcros), i now don't have the money to try a similar uncomfortable quest with a new brand.