I like the WorkSharp ones. I have the bench stones and the portable guided field sharpener like one shown above in my vehicle and on my night stand if I need a touch up. Its a great all around sharpener. Even has a piece of leather to finish. I have the Precision Adjust System, but it does not seem natural. I have used it for larger tools like an axe. The angle sharpener with the tri stones is not too bad.
I have several Arkansas Tri Stones and some black ones for fine stuff. I prefer them for my better knives. And a few good leather strops to finish them off too. Multiple small dog bone style ceramics for hooks in tackle bags. And a few rods in the kitchen for those knives.
I don't own a powered sharpener. Just never had the urge for one. Blades get too beat up, take a grinder to them and work them back in shape.