Should probably be 5 stars. It just seems a little cheesy to be plastic. I think it could be aluminum for the same price. I installed them in about an hour but didn't follow the instructions I don't recommend, that's your choice. I just jacked it up, removed the front tires, unscrewed the bottom two bolts on each bottom brace, pushed the top arm down and had my adult son put the spacers back on. Mounted and tightened bolts, washers and nuts, tires replaced and laid on floor. DID! Raised my 2009 GMC SIERRA 4wd 2 inches. Make sure you align when you're done.