So far I've only used the compressor to top off the air in my tires. It's well suited for this task but (not surprisingly) much slower than the compressors found at gas stations. This kit was evaluated for fixing flat tires by Consumer Reports in its January 2014 issue. They tested on 15 inch and 16 inch tires, with punctures from 1.5mm nails and 4mm nails. Though a compressor-and-sealant kit like this is more expensive than an aerosol sealant (like Fix-a-Flat or the Slime Quick Spair), the compressor-and-sealant kit has the advantage of being able to inflate the tire up to 40 pounds per square inch after sealing. In their tests, the aerosols only inflated to 18 psi. This is helpful if you aren't going to drive straight to a gas station/tire repair shop after you've sealed the puncture. In Consumer Reports' tests, they drove each car a total of 100 miles over the next six days after sealing the tire, with no loss of tire pressure. They don't exactly recommend waiting that long to have the tire professionally repaired, but that's what they tested. Caveats, according to the report: - No sealant, including the Fix-a-Flat Ultimate, should be used to seal a puncture on a tire's sidewall. - Sealants leave a messy residue on the inside of the tire and wheel. A tire shop might charge extra to clean it out. - Sealants might gum up a tire-pressure-monitor sensor. Usually, all the sensor needs is to be cleaned. - The Slime Smart Spair is available for a lower price than this product. According to Consumer Reports, it works just as well, but it has extra steps.