Kirk W wrote a review of Petzl Summit Mountaineering Axe on January 25, 2014
I've owned several ice axes over the years and this is the best yet. A great combination of carrying comfort and performance. It swings well, works great in self-arrest, and can handle moderate technical challenges. It isn't the lightest axe out there, so if you're using it for moderate glacier and snow climbs (the trade routes on mountains such as Rainier and Baker come to mind) I'd suggest something more like the Black Diamond Raven Pro. For an all-around axe that can leave off where your technical ice tools take over, the Petzl Summit is hard to beat.