I have the Ken Onion version -adjustable angles - and like it.

Practice on beater knives for sure and understand if you want a fine or toothy edge before you start.

The kitchen knives were good practice after the true beaters, before tackling any others. None of my knives are very high $$$, but it did a nice job on not only the EDC SOG, but also the Gerber fixed blades and even the BK2.