They were very hard to move. If the car was not finished they may work but if you are trying to easily move a finished car with one person, these are not the correct ones to have.
I never had any issues moving my cars around my shop by myself on the dollies, complete cars included. On a sloped driveway I needed two people.
But this shouldn't be surprising, how easy do you think it's going to be to move a 3,500 lb car? They're just dollies, they don't defeat the laws of physics.
