I'm on my third incarnation of this type of grinder, built the first one about 30 years ago and can attest it's by far the best grinding system out there for grinding tools. It's a truly slow speed grinder, unlike the rubbish being pawned as slow speed but spin at 1700rpms. The one on the site has a range of 200 - 2000. When you grind at 300rpm or below it's a very different experience that makes grinding extremely easy for even the klutziest person. Definitely looks like a well put together system, much more refined and compact than mine. The one on the site has a couple draw backs: It's relatively expensive, and it only grinds. My latest incarnation cost about $350 and grinds and hones pretty much any type of blade.
http://cuttermasters.com/specialty-g...-tool-grinder/
I have no affiliation. Who cares if I did. It's still the best grinder you can buy for sharpening your tools