We use both - depends on the area. We have one stand that takes deer year after year (including one year when it took five bucks) - it looks down a long alley, but generally the crossing point is so close to the best shot perspective, that it really helps to be off the ground.

On the other hand, the second most productive spot we have is a blind at the edge of a field - it' s just a bunch of hay bails set up to make a blind and it makes a great shot.