It depends on what you want to do. I actually got much better at free hand sharpening after using the Sharpmaker for a while. I could get a hair shaving edge before, then after using the Sharpmaker for maybe a year or 2, I tried freehanding again on just my coarse/fine Norton stone and I could get an edge that would split a beard hair, no stropping or anything finer than the Norton Fine India.
Free hand sharpening is good if for no other reason than you will eventually run across something that wont fit a jig, is too big for the Sharpmaker, and/or cant be easily held with one hand. After my belt sander started throwing pieces back at me, I sharpened my Cold Steel panga machete with a file, 220/1000 grit waterstone, and a strop while resting the handle of the machete on the tailgate of my truck. It will catch hair above my arm, though it seems I quit too soon with the file, as there is still some damage near the belly where it impacts the ground sometimes.