Okay, if you've got a chip or small crack in your windshield, this repair kit can save you a ton of money compared to full glass replacement. The nano repair liquid has seriously good penetration ability - it seeps into those tiny cracks and chips to bond the glass back together. The upgraded resin has a shear strength up to 25PA and is apparently five times stronger than glass itself, plus it's non-yellowing so your repair stays clear over time. The vacuum function creates strong pressure that pulls the resin deep into the crack for a solid repair. You get everything you need: the repair solution, five curing strips, and the application board. It works best between 60°F to 90°F, and avoid direct sunlight since the resin solidifies quickly in sun (takes about 15-20 minutes to cure). The key is making sure the resin fully permeates before curing because you can't redo the repair once it's set. This thing repairs all types of laminated windshields and actually minimizes the appearance of damage while stopping cracks from spreading further. For the price, it's way cheaper than replacing your entire windshield, and it's surprisingly easy to use - takes just minutes once you get the hang of it. Keep one in your garage and you'll be ready next time a rock chip threatens to ruin your day and your wallet.