Stop in for a cup of coffee

Went to a friends garage last weekend to look at his car lifts. He has a single and a double lift. He buys the drive on type lifts.
He feels that for storage (the double lift) is the way to go. He has two on it and two under it.
The single has a small lift within the lift so he can lift the car he's working on a couple more feet and remove the tires, work on either end etc...
I might go with the single drive on style it looked really stable.
Open for comments.