Agree, those are much better, cost a bit more too.
Disagree somewhat - As I stated in the video, these are the generic version, but still apply the same principle. When your whole back end rises about 2", that's a lot of pressure being applied to the rear tires. Ask yourself, "how much would I have to lift above the rear axle to raise the car up 2 inches?". About 200 lbs or more of pressure, meaning that's about how much is being applied to the rear tires. again, the generic form, but still do more than just "looks".