acts stable

and carrying my car, a bit high for my taste but I would indeed be able to measure that it is automatically engages when off sometimes convenient (quick fitting) and sometimes impractical (you lift at the wrong moment you have the car lift higher pull out to get him back )

edit: take the last sentence to heart absolutely. the lift is set to maximum, it provides the goat under and drives him to the top of. so far so good. the unpleasant surprise comes when draining because the retraction of the bocks have to him again only 5mm off until it can fold. if that does not work (like mine yesterday nachmitags happens) you have to jack up somehow the jack to the car even greater lift and to fold the actual bock.
is not really a criticism and if you lining up so stupid -> own fault