Mark Richmond at CKtG recommended it to me for my daughter. I bought one for her, tried it on some Sab carbons and Forschners and thought it was very good as those things go; but I didn't throw out all the other sharpening stuff, reload my credit card and buy one for myself.
Lily, my daughter, certainly loves the Minosharp for her MAC Pros;
Whether or not it's the right sharpener for you and your knives depends on you and your knives.
If you've got good knives with a 15* set, are debating between a Minosharp3 and an EP, and can afford the EP, the EP is a better sharpener. On the other hand, if the alternative is a Chantry, get the Minosharp3.
Be aware that the Minosharp3 is set at 15* and will only do 15* (or close) knives. If you're set has Hiromotos and Henckels, you want to use a Minosharp to sharpen both, it's not a great idea.
If you've got a drawer full of Globals, a Minosharp3 might be first choice.