I LOVE IT! This air liner is amazing, it's so well engineered you can beat a bear to death and still inflate a tire to 80psi. and found that they mostly die out afterwards. I am 51 and have pumped up tires for a very long time and have never had an air liner as good as this. I've had a lot of really good cartridges, but over the years they've all ended up in the garbage heap. Then I went in search of a new air cartridge that would outlive me, and I found it. That's all. It has a cool pressure gauge on it, I can read it without glasses. (That's actually very cool) This is an all-metal construction, not just cast metal. The body of this air feed just screams quality and now that I've used it I'm getting more for different friends. I sincerely believe this air liner will last longer than me. It's worth the price.