The CCH Hybrid Alien used to be the best cam for pin scars, especially in Yosemite and Zion. Now the Black Diamond Camalot X4 gives it some stiff competition. This used to be my go-to cam for big walls and climbs featuring shallow and tight placements. Why? They used to be the only secure cam for shallow pin scars. Now we mix this up with a set or two of the Offset X4'd. The chief disadvantages of the Aliens are their reliability and durability.
NOTE: Fixe now has a new Alien that we have not yet reviewed. More info is found at SuperTopo under Fixe Faders Alien Cams.