Not very easy to use and instructions not very good. But if you're at all mechanically inclined. Understand what a tire is. You can make it work. The first I've ever done. The piston pushing on the piston runs along the piston, not straight into the end. The gun jammed and ruined the fork. I keep it in my car since it's one of those new cars with "slime" and a pump repair kit. Your tire changer will NOT patch a tire with slime. If you use street tire repair kit with your BMW/Fiat/Prius, buy another tire instead of paying $20 for repair. Get a tire plugger.