The MK.2 is quick and easy to use. It works great to touch up a blade at hunting camp or to whip an edge onto everything in the knife block at home in the kitchen. I like how easy and simple it is to use.
I do still prefer a good stone sharpening for some of my favorite knives to get that razor sharp edge that this doesn't seem to offer but for all other intents and purposes the MK.2 has my vote!