Great edge control, little unresponsive
Billed as the market leader for all mountain skis, I've found the AC 40s very good. Best edge control of any ski I have tried. They are a very stiff ski - not very responsive for short turns or in tight places (I used to ski the K2 Recon and preferred them for ease of short radius turn initiation). Get spanked if you drop into the back seat. Still pretty good in alta powder. Quite a heavy ski when combined with the piston bindings. I got them for $699 from backcountry.com end of year sale and at that price they are a bargain given their versatility in almost any conditions fromm pow, to crud to ice.