In reply to PPP:
I picked up a Petal Summit Evo last year as a lighter alternative to my DMM Cirque.
Significantly lighter, feels good in the hand when walking and 'bites' well in self arrest drills. The reduced weight and shorter length means I can pack it inside my sack when using telepheriques, etc in the Alps.
The lighter weight does make step cutting a bit more of an effort, but overall I've been very pleased with the Summit Evo.
For longer Scottish winter days on mixed terrain, I may still use my Cirque though as a heavier duty tool.
Overall, glad I bought the Summit Evo. Works well, carries well, and packs well when travelling by air.