Not used that one, but there really isn't much to switch pullers, as long as the bent bits of metal on the end fit on the switch latches. The free one I currently have is just plain steel instead of powdercoated, and works 100% fine. Takes maybe two seconds to pull out a switch.
On the other hand, keycap puller design matters. The free plastic ones with two legs kind of suck. The ones that resemble an egg beater, with two elongated metal tines, are vastly superior.