It is worth it. Although I have not been able to sharpen every single knife exactly how I want to, it does what I wanted it to do-
KITCHEN KNIVES!!!
In less than 1 hour I re-profiled EVERY kitchen knife (I have quite a few), they are ALL sharp and some are quite large and long Chef's knives.
I hit them on a "V" hone every now and then to keep the edge straight. I got this for Christmas and have not had to resharpen. Keep the steel straight, yes as some cut bones, etc. But after the 1st "sharpening", I have not had a belt back to a single knife, Just a small pull through ceramic "V" and 9 or 10 months later, they are still sharp with very minimal maintenance. Pocket knives I can do on a Lansky, Gatco, CRKT, KME or any one of a dozen other sharpeners, natural stones, man-made stones and diamond stone kits, including a Sharpmaker, DMT, Lansky "V", and the small hand held "V" I keep the edge straight on and if all it would sharpen is kitchen knives (the reason I wanted it), as they can be a LOT of work by hand, even with a sharpener kit. It would have taken a week or most likely 2 in order to sharpen just the kitchen knives, which only took about an hour, that included setting up, reading directions, etc.
Get one if you have a lot of knives. (not the best for thick knives, look at the specs before buying, it will tell you what they max thickness blade is.