Robust, easy to use, button easy to push, comes well lubed.
Does not depress/release pin valve, keeps it depressed. see review for more
I got this as well as an Empire micro rail (which i love btw) and this so far, has done its job well, but has also been a total pain in the ***. It does not depress or release the pin valve on your tank, it just blocks or allows the air. much like the on off on an epiph, just with a button. It is also VERY easy to forget which side is off, not like its really that big of a deal. This does also not vent the pressure in your gun. i think that mine was also not made to spec, as it has done a VERY good job of shredding the threads on my tank. It is a very tight fit and i have to make sure that the tank is PERFECTLY lined up or it wont go in, just spin. This has a very good anno, nice milling, it looks cool. Does its job. I would just say, get one that actually pushes the pin valve (if im not mistaken, i believe the RAPS does this, and does a very good job of that) and you will be much happier.
Not too bad of an asa. If you are strong enough (if your not you shouldnt be balling) to turn your tank in all the way, its not that big of a deal. More than anything its just a little inconvenience (sp?)