Bought one first and then two more and changed over all my floor pumps. I got them on sale for $20 each which was a great deal. I had to reduce down the end of the tubing on my old Silca pump but I was finally able to get it on with the supplied compression fitting so I did not need a hose clip. My other pumps had smaller diameter hoses and the pump heads went on without issues.
The pump head just slides right over the valve body and locks on with the attached lever. When done pumping just release the lever and the pump head slides right off, It even has a button to release some air if you want to reduce the pressure.
It is metal and built really well so it should last a lifetime. No more damaging tubes or valves trying to get a pump head off.
This is a game-changer. I've been using it for a few weeks and have only been happy with it. For the first few uses I checked it with my old, reliable analog gauge and always found it exactly right. It's so nice to get those few pounds in to make my ride perfect. I still carry a manual pump and CO2 on my ride, but am considering switching to one of these for on-bike usage, too.
This nifty little device does indeed replace most CO2 cartridges in your bag, it is NOT cheap, it is sized better than the cartridges it replaces though. I do have a friend with it that used it prior to my purchase and sang it's praises. I run tubeless and last puncture pulled it out. It (or maybe me) failed miserably. I am suspicious that the puncture, which was deep and when I later removed my tire found a sizable glass shard inside of the tire, was too great to pump the tire back to snuff given the volume and ended up using a CO2 cartridge. Alternatively, maybe I was not able to press the nozzle head onto the valve sufficiently. Moving forward I will probably use the included screw-on adapter intended for use with tpu tubes to be certain it's not a me issue.
It charges quickly and seems to maintain charge over time when not used. It's small and light and fits easily in the back pockets of my jerseys. While it doesn't inflate to 'my' 100%< at around 75PSI, it's more than effective. I love not dealing with cartridges any longer, though I carry one in my saddlebag as a backup. It does get a little warm when using, but not to a bothersome extent. Also great the other day when my tubeless setup sprang a leak and lost more air than needed to get home. I topped it off quickly and was on my way.
