I know that rotary lifts will take a lot of abuse, I overload them quite often. The heavier the object, the more important it is to get a good lift. If it's just a TR or half ton pickup, a cheap asymmetrical will work just fine, and work real good with the TR's huge doors. Lifting a 3500 4X4 4-door dually? You'd better spend the cash to get a good one.
hope this helps.
bob