[jwd]

I copied this from another forum:

4 post advantages:
-easy drive on drive off
-free standing, no need to anchor down
-can easily be moved with optional wheel kit
-can be used to store two cars in one space
-by building or buying center decking (to fit between the ramps), the lift can be used for motorcycles, lawn mowers, etc.
-the decks are a good place to put tools, parts, etc when working underneath your car

4 post disadvantages:
-takes more floor space than 2 post
-you need to use jack tray for suspension work

2 post advantages:
-uses less floor space
-good for suspension work since the suspension is unloaded as you lift
-better access to underside of car due to lack of ramps

2 post disadvantages:
-must be anchored down, if not done correctly can lead to a disaster, especially the asymetrical lifts, concrete must be 6" thick
-need to position the lift arms each time you lift
-access to interior can be impaired by doors hitting posts and lift arm placement
-definately NOT to be used for storage