suspension posts, at least to me, are only good for commuting duty or for roadbikes, etc.
Like one of the folks I know who has a pretty nice mtn bike, older than mine, but his has full saint
. He has a solid post/saddle he uses off-road, and a suspension post/more comfy saddle he uses for commuting. makes sense to me...although i would be a bit weary of taking anything with full saint commuting...to get that broken would make me cry