I went after the WSKO and then the BGA as a supplement to my paper wheels for reprofiling and other heavy stock removal tasks. After using it a fair amount, even getting some micro mesh aftermarket belts for it, I think i'm going to go ahead and get a 2x42 or 2x72 instead. Here are my impressions:
PROS:
VERY portable
Fairly stand-alone. I like to clamp it down, but otherwise it's very self-contained.
With fresh belts, it works well!
Variable speed
Guide system is easy enough to use.
CONS: (IMHO & Experience)
Belts wear out fast, and I mean pretty quick. I sharpen a lot of kitchen knives, and after 8 or 9 the coarser belts just don't remove material quickly.
1" belts leave something to be desired.
Price: after getting the WSKO and BGA, plus some extra belts, you're pushing $250-275.
Belt tensioner tends to stretch belts out significantly, especially the higher-grit belts that aren't constructed with stiff backing.
For me, sharpening in a semi-commercial setting, I find that the ease of portability and helpfulness of the guide are overshadowed by the relatively short life of the belts and overall miniature feeling of the machine. Just my .02, good luck decking.