- Familiarity: I've used it once or twice and have initial impressions
This CO2 pump is missing a key feature: threading to lock the pump onto the presta valve stem. Instead it is totally smooth and slippery on the inside. As a result, the pump pops off the valve stem unless you hold it down. As you know, CO2 pumps get very cold, so it is hard to hold without getting cold burn on your fingers. This is a serious oversight especially for such an expensive product. Better products (which have that threading) are available on Amazon for 35% less.
There is a dial to control the air flow so you can add air slowly preventing a large burst of air. I've tried cheap ones on amazon and they wear out after a few uses because they are plastic. Definitely stay away from those.