It is an interesting design and won’t sag like a hydraulic jack would. I wouldn’t trust my life to it though.
The two things on it that I don’t like are the top surface and the base width. I like a Jack stand with a good U shape that fits around a structural component. This positively prevents the vehicle from slipping off. The other thing I like in a Jack stand is a wide base. The higher the lift required, the wider the base is required. This prevents the jack from tipping under side loads.
When my life is at stake, I require a large margin of safety. I want the jack stands to handle much more than they would ever see for slipping, tipping or breaking. I test it to make sure it is plenty robust enough before getting under the vehicle.