I concur with the other reviewers that one should read the instructions well before attempting the repair.
I used the repair kit to repair one 1.5 inch diameter star-burst and two small nick/chips - one of which was in driving view.
I ensured the car was in the shade and cleaned out the crushed glass out of the rock impact area with the included blade. I cleaned the repair area with soap water and a glass cleaner till it was squeaky clean.
I secured the repair assembly, with the 4 (good quality!) suction cups, to the windshield centering the housing over the rock impact area. I screwed in the resin delivery tube into the housing till it's rubber tip was flush with the windshield and centered to the damage area. I then added a few drops of resin (is same consistency as 3-in-1 oil) into the delivery tube and finally inserted the pressure tube which forces the resin into the crack by opening the rubber tip. I let it cure for about 10 minutes after which I placed a drop of resin on the center of the crack and placed the clear plastic sheet on it and put the windshield in direct sunlight - waited another 10 minutes and removed the plastic sheet. I scraped the excess resin with the blade.
I was very happy with the results - the damaged area, filled in with the resin, was see-through, not smoky like I have seen other windshield repairs. The cracks filled to the extent that the crack was accessible. The resin could not repair a "fracture" as there is no way for the resin to reach in between the fracture. The resin did obliterate the crack lines where it did reach.
The end result is that the star-burst is still there but less visible, both the nicks/chips are reduced significantly (90%+) and I can make them out only because I know where they are. The one in my driving view looks like a small pit instead of a chip. The only thing I am waiting for, this winter, is to see if the resin holds up to the heating/cooling.
It took me about 1 hour to repair all three areas.
The product is designed thoughtfully and is effective. The quality of materials is good. The really great thing about this product is the fact that the resin cleaned off with soap/water and did not harden on the skin. I could clean out the delivery and pressure tubes which means that they can be re-used......there is enough resin/plastic sheets left to repair a few more cracks.
DON'T use more that a few drops of resin...a little goes a long way!
I gave one-less star for false advertising. The company surely knows that fractures in glass cannot be repaired and should not advertise an "after" photo which shows a windshield with no hint of having been damaged.
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Fix-A-Flat - Fix-A-Windshield, Do-It-Yourself Windshield Repair Kit (161890)Product Description: Fix-A-Windshield Do-It-Yourself Windshield Repair Kit repairs chips and cracks quickly and easily!Minimizes the appearance, and stops the spread of chips and cracks in your windshield.
Easy to use - takes only minutes!
Product removes air from the break, fills it with a durable resin, and makes it even stronger than before.
The repair is almost invisible
Kit includes:1 gram bottle of repair resin, repair device, curing strips, sleeve razor blade, and instruction sheet
Kit is good for multiple repairs
By the makers of Fix-A-Flat
Buy cheap Fix-A-Flat - Fix-A-Windshield, Do-It-Yourself Windshield Repair Kit (161890) now Get 55% OFF
This is a wonderful window cleaner that works exceptionally well on those hard to reach front and rear windshields. In fact it works great on all glass. They say this cleans by just using water maybe it does, but I use a vinegar mix and it works great. A nice feature is that it comes apart to store in your glove compartment. Where has this been all my life, it makes cleaning windshields and all auto glass so much easier. I would highly recommend this product. 
