I've been out with the Oberharzer axe a few times now and thought I'd offer up a few observations.
It arrived with a perfectly serviceable but unexceptional edge and, thus far, I haven't done anything to dust it off and make it properly sharp. I have been processing some ash and beech and used the axe for limbing the trees and then splitting the logs that came from them.
Before the actually using it, it's worth mentioning the mask. This has the appearance of being well-made - stitched, rather than riveted - and of nice, thick leather. The reality is different: the poppered retaining strap was so loose that the mask could be removed without undoing the popper. If this happened when stowed neatly in a pack, the damage to other kit or to an unwary hand plunged in, looking for something, could be ugly and painful. The mask definitely needs refashioning/remaking.
For limbing, it works well: it cuts cleanly and is easy to wield and use for prolonged periods. The cutting edge shape lends itself to a natural slicing action which makes the task that bit easier. I did try and choke up the axe, holding it just below the head and trying to create a feather stick just for fun, but I found the quite boxy section of the handle just there uncomfortable to use and, inevitably, the edge wasn't sharp enough. I think I might round off that section of the handle to make it more comfortable to use; I'll definitely get busy with the stones to sort out the edge when time permits.
For splitting, the Oberharzer is an absolute dream! The weight of the axe head, along with the shape of it meant that splitting pretty much anything was really easy. Admittedly, I didn't try it on seasoned hornbeam but it sailed through even the knottiest rounds of wood with an ease that made me smile. The slightly fuller handle offered a more secure grasp and I never experienced any 'hot spots' during use.
I have to admit I was a little skeptical about this axe when I first got it, thinking that it wouldn't get close to the Wetterlings/Gransfors ideal that I am used to. I am delighted to say that my misgivings have been proved to be totally unfounded: mask aside, this is turning out to be a great wood-processing tool and is fast becoming the axe of choice for my outdoor adventures.