I have the TruCut. It cost about $42.00. I have been using it to touch up the blades. It appears to do reasonably well but doesn't appear to sharpen to new state.
It does not take out the nicks. The suggestion to get the Harbor Freight blades is a good one. I don't believe the TruCut will sharpen to original sharpness and proabably does not save that much from the Harbor Freight blades which are great. The other sharpeners are not worth the $$. Save ouf $$ and buy a fat quarter or a new spool of thread.