[mercman from oz]

Comparing the Two Post Hoists with a Four Poster, both have their advantages and disadvantages.
With a Four Post Hoist, the vehicular is more secure but the wheels need to be jacked individually for attention.
On the Two Post Hoist, the wheels are free, however, there is more strain on the actual car.
When we were doing the brakes on my Mercury, when the car was on the Hoist, I had difficulty opening the door to allow me to pump the brakes.
When I had finished pumping the brakes, I could not shut the door because of the location of the Arms under the chassis bent the chassis slightly.
Had the car been a Convertible, the added strain would have been much worse.
That is my 2 cents worth.