Upon receipt my wife informed me that CR had written an article in their June issue. I read that after 2 different tests the "Slime" repair kit did not fill and did not hold a 5.8mm puncture. It worked with a puncture of 2.4 mm. That didn't satisfy me, so I went back and ordered the recommended ResQ Pro+, which sealed the 5.8mm hole in testing. Worth the extra money for something that actually works. I'm sure ResQ Pro+ has its own problems. Gave 2 stars for the small 2.4mm puncture hole.