That combo jack stand has the worst reviews, ha. Cool idea, wish it was still on the market. I don't like leaving my car on the jack, but once it is up, there's nowhere to place jack stands. So, my jack stands to under the control arm that is up in the air. If that arm can bear be weight of the car on the ground, it can hold the jack stand. But the control arm might deform if I rest the weight of the car on a small point, so I leave he weight on the jack with the jack stand for "in case."