I have an MKII and it's great. It excels at holding narrow chisels and at holding odd-shaped blades - like the tapered width block plane blades from LV. There are three different 'height' settings too, which makes it possible to hold very short blades like those for spokeshaves and still achieve a variety of bevel angles.

The MKII also has a little knob that also changes the eccentricity of the roller slightly which makes it possible to put 2ndary bevels on a blade without unclamping.

If you want something that is no-brainer repeatable and accurate, then this is a good guide.

If you want to ultimately learn to free-hand sharpen, then you'd probably do better to skip the training wheels. Further, free-hand sharpeners usually recommend hollow grinding b4 honing, which the MKII won't help you with, since it only works on a flat surface.