David McQuinnwrote a review of Lezyne Repair Kit on April 2, 2017
Familiarity: I've used it once or twice and have initial impressions
The first and only time I tried to use this, all the gas leaked out around the Presta valve and I had to walk home. I only carried one CO2 cartridge with me. It just did not seal at all to the valve. There's no threads. I just held the fitting onto the Presta valve (which was screwed open of course) as hard as I could. Still don't know what I did wrong.