I have over 30yrs experience with mini-pumps, and have seen it all in that time. This one is a solid choice. It has a simple lever lock, which squeezes the rubber grommet down on a Schrader valve. I have a mix of valves in the fleet, but am perfectly happy using Presta-Schrader converters (as pictured) as they are often more reliable than a native Presta connection, due to the larger interface. If you are a "Presta only" person, and have some objection to the adaptors, then maybe look at other models too.I see confusion in the other reviews about how to use the Presta adaptor. You should screw it securely onto the valve first, then affix the pump to it as if it was a standard (car type) Schrader valve.I have had many mini-pumps break on me over the years so I can say that this one seems to be robustly constructed. The key thing is that the head unit, where the chuck that attaches to the valve is, continues well down the shaft/barrel. I have had Blackburn pumps where the plastic head/chuck was literally just the very end of the pump, right around the valve interface. Over time the plastic fatigued and broke off at the worst possible moment. Designs like this, where the head continues a few inches down the shaft reinforces this high stress area substantially.The supplied clip that mounts under a water bottle cage (bottle cage mounts are pretty standard on nearly every bike) offers a secure fit, and is my preferred way of carrying a pump on the bike (I also like to carry them in my hydration pack). Just in case that is confusing, you needn't even have a bottle cage, you just need to have the mounts, and this pump clip will fit just fine.The other complaint I see in other reviews pertains to the time to pump up a tire. There is no getting around basic physics people! The internal volume of a mini-pump is small, and it will take a little while to pump up a tire, particularly a fat mountain bike one, or a high pressure road bike one. Regarding high pressure, I also see people complaining about mini-pumps, in general, taking a lot of time, or being unable altogether, to reach higher pressures. I call BS on that. With a mini-pump you are balancing air volume and effort. The fatter the pump is, the harder it will be to pump, but the fewer pumps it will take to fill up a tire. The inverse of that is the skinnier the pump is, the easier it will be to pump, but the more pumps to fill up a tire.This pump strikes a good balance, and can achieve all the pressures you'd need on normal bikes (save for track bikes, but that's less than 1% of the market). It may take a bit of time, but all needed pressures are very achievable.Pro tip: When using a mini pump like this model, which has no hose to separate your pumping force from the valve itself, it is very important to support the valve/pump head complex as you pump. In other words, you'll have one hand on the pump handle, and rather than having the second hand wherever, you want to cradle the pump head and valve stem, to counteract/neutralize the force from the hand on the pump handle. Otherwise, you may compromise the seal between the valve and rim (if using tubeless valves) or snap the valve off altogether (if using tubes).
