I have the blackstone portable spinner FC-01-SPIN, I got it for 3k about 3 years ago and use it about 3 times a week. I love the machine. But to be honest, after 400ish sharpenings if I was to guess, I am still not sure that I know what I am doing. when people ask me to do their skates, I do, for free, but I tell them no promises on quality. I have gotten to the point where I love my sharpening, but I dont know if its really any good. I check the edges in 3 spots every time, but even though the edges look great, I still dont know. Maybe I am just overly worried. Everyone has always said that the sharpening is good, but when its free, some people might not complain.
If the sparx was out at the time I bought mine, I would def have done that instead. But the big question I am asking now, is should I get ride of my blackstone and move to the sparx? I like the fact that It doesn't make any dust, I have to use a vacuum and even then, sparks and dust are all over the area my machine is in. Id love to be able to control that the way that sparx does. Also, my son is now starting to play hockey, and Id love to be able for him to use the sharpener himself as well. I most likely will not get the sparx, just because I already have a solution that works well, so why rock the boat. If I had got in on the kickstarter, the price may have been worth it.