Yeah I was pretty impressed with the Harbor Freight honer quality once I got it working. Not impressed with the quality of their assembly tho.
Good thing I tested it on the junk spare block I've got first. First spin of the hone, 2 of the stones came flying off. Cheap glue holding em on.
So I went ahead and epoxy'd em back on and let it harden for an hour. Once I did that it was golden. Finish came out awesome and it was so easy. Hardest part was figuring out how far I could come out the bore with the tool. When you get past the center fulcrum the spring forces the stones at an angle. That angle rides the corner and it'll crack the stones in half.
Once I got all those kinks worked out it worked out really well. I'd gladly do that instead of hand cleaning the bores with a scotch pad again. It was so damn easy.