I’m a sparx owner. I have to 2nd the comments on the poor hockey shop sharpening. Yes there are some conscientious shop owners who do a great job sharpening, including my local shop owner. However, they aren’t available 24/7 and the quality of the kid subbing in was crap. This is especially a problem here in the south. My 14yo can sharpen his skates anytime with perfect results and I don’t have to plan on getting to the rink 30min early for a sharpening only to be told there is a backlog of skates. This doesn’t even address the issue with changing the profile over time- which is a definite problem with all manual sharpening. I am sure an expert sharpener can do as good (maybe better?) job than Sparx. However, on a consistency basis, Sparx wins every time. I had my son’s Bantam team at my house and once they saw it work, they all wanted to try it (including the dads) and to a man, everyone was convinced it was the best sharpening they had ever skated on- even though every kid did his own for the first time. The money is an issue- I’m a long way from “paying” for this in $ saved, but the convenience factor makes up for this in spades. I’ll continue to support Sparx and recommend them to anyone around.