I want to start by addressing a common knock against mini pumps. Yes, it takes a lot of strokes to get the pressure up to where you normally would ride your tubes, but to me that's the beauty of this pump. It's incredibly small even for minipump standards, and it's got a controllable valve for threaded CO2 cartridge so you can start hand pumping first to make sure the tube is seated, and then use the CO2 cartridge to get to your desired pressure. I had to use this a few weeks ago after a particularly unfortunate descent, but it worked like a charm and I was absolutely glad I had this with me! Before this I used to carry a dedicated CO2 valve and a mini pump, but with this I've replaced two items with one, better functioning, smaller, and lighter item! Love it.
Small enough to fit in a jersey pocket. A good inflator with excellent control. The screw on chuck ensures a good connection with the valve. It takes several hundred strokes to get enough pressure to ride on, but great for topping off or emergency purposes. Pumping is easier if a cartridge is installed, giving you handle to push against without stressing the valve.
So far I personally have not had to use this to get me home but it did help two riders that were stranded with out a means to inflate their tire. a few strokes to test the old tube to see where the leak was and then a few strokes to put some air in the new tube before inflating with a CO2 cartridge. The flow valve works great but this is all metal so it can get frosty during inflating. I sure made the day of two riders that were going to have to wait for a pick up rescue.
I havent used the pump yet but have it installed with the mount that comes with the pump behind my seat tube water bottle bracket so its in a convenient location, stays out if the seat bag and added security of have both CO2 and pump capabilities in one in case I have a have a bad day of flats.
This pumpinflator is really tiny, small enough to fit in a saddle bag along with a few threaded CO2 cartridges. It's got an extension sleeve for presta valves, and you'll need to extend this sleeve before you fill a presta inner tube. Overall, a great piece of kit for road riding.
Easily fits in my saddle bag and light weight. I wanted something to cover both CO2 and regular pump for those small top offsseating the tube without worrying about running out of cartridges.