postoak
AH elite
They would be fine for long range sniping at smaller animals but medium to large game animals dont require that level of "snipeability". I shoot rabbits to 150yds standing over my bogpod so an animal the size of a small deer on upward should be a doddle out to way further than that.
You are assuming everyone is as steady as you are -- which some of us aren't!
As for slow to set up, in Africa your PH will be setting them up. You just have to place the rifle on them and then adjust to the target. You don't have to "construct" them just the once when you arrive.