Downsides
1. CWD and baiting are linked
2. Mostely see young deer at the bait
3. Very seldom see bucks at a bait much less a big buck
4. Changes the natual movement of the heard.
5. Too many deer at close range at one time ie too many eyes chances are you will be spoted when you go to make a shot.

Upsides
1. Encreases your chance of seeing deer, squirels, racoons etc.
2. Good tool for up close picture takeing


Might have missed some in either bracket but I think the downside will always outweigh the upside.
IMO the best way to hunt over bait is to hunt a corn, bean or other kind if crop field. The deer will be moveing natually and could appear anywhere on the field makeing it a little more like hunting.