I have a pair of quad ramps which have always provided enough lift to get me level or nearly so. I am nervous about parking on the top space in case I overshoot (my van is an automatic) and cause damage to the van, this is not helped by their physical height which can be too close to the bodywork before I begin.
This is my second set as the first set broke when an unseen stone broke off a section of the ramp when the vans full weight was on it.
Had the quatros as i needed the height. Not a lot of choice available.
They are quite large to store.
Have seen many, including mine, where the front of the ramp has broken off, probably caused by driving over them.