Its not so much the jackstands will hold up the car if the jack fails, it gives you a few more seconds to get the flock out of there if nothing else. I like to put some tires and rims or a big piece of wood under the side of the car to stop it if it comes down. I usually work in the dirt, so jackstands dont really work well. I like that jack. Most people chuck them because they think they cannot be repaired.
had one just like it looked JUST like it .was spooky to have it up with just those 2 arms, i used to slide a wood 4x4 across under the arms, made me feel better......