In review, the pros for no lifter are:
--Strains the calf muscle on steep terrain.
--Can cause you to lean too far forward, which may lead to slipping backward.
Pros for the mid-lifter are:
--Eases calf stress as the terrain steepens.
Cons for the mid-lifter are:
--Lose some ski precision
Pros for the high-lifters are:
--Trail breaking in deeper snow is easier.
Cons for the high-lifters are:
--Harder to balance
--Short/too forward to stride
--Stressful on quads
It should also be noted that ski crampons don't work well with high lifters. Most brands won't bite well when your heel is highly raised. There are a few that remain fixed to the ski, but most don't...
--Jason D. Martin