Familiarity: I've used it once or twice and have initial impressions
I was intrigued by the claims made by this product and thought I’d give it a try. I mounted one on my rear wheel yesterday, pumped it up, started putting on my shoes, etc and then, getting ready to ride, noticed that the tire had gone flat. Ouch. Putting the tube underwater showed a steady stream of bubbles from the join of the stem and tube. Manufacturing defect. I contacted the manufacturer and they apologized profusely and immediately sent me a replacement at no charge. Let's see if the new one actually works!