Not to pick at your post, but there is a notion that you can only get repeatable results with a guide or gadget. I measured my irons last year to see what the effective final angle was (on common pitch bench planes) and found that they were all within about one degree of each other.
I am about to make and put up a video about preparing chisels. Quite often, I see people troubling with chisel preparation for two reasons:
1) they're told that it's going to be difficult and that the only way to avoid that is to buy new premium chisels
2) they're using the wrong tools because they've been advised by someone who told them point 1 above.
Sharpening a draw knife that's in good shape is a bit easier to do freehand than it is with a gadget. Maybe not the first time, but certainly the fifth. If you are going to do something like this with any frequency, you will have a net loss of time (not to mention money) with the gadgets. This thread is old, so I don't remember what I said, but it's probably something along the lines of supplying tools to a captive audience and that audience being one that demands first-shot success, as well as the instructor wanting the same thing (so that the captive audience doesn't make them spend time instructing them on sharpening - which is certainly not a paid-for endeavor for the instructor).
I prepared three sets of sorby chisels this weekend, all brand new and all had some minor flaws. It took less than an hour for all three sets from complete flattening to finish honing. The total cost of the sharpening kit that I used was about $70, which includes the stone, some glass, some PSA paper, etc. The video will be findable on youtube in a day or two.
As far as boggs' comments, etc, you can't really rely on them. He can only say one thing about a tool like this, and in his demonstration of his own sharpening, no such thing is used. He's in the community of boutique instructors, and it's sort of like a fraternity or fraternal club. I have been admonished several times by members of it who believe that you can only say positive things about instructors' or tool makers' efforts.
That said, if you enjoy the gadget and have good success with it and never want for more, it's not my business or anyone else's. Your opinion conflicting with mine doesn't make me fear the end of the world, and I don't think you should take anyone else's so seriously.