I have a GB1 and GB2. They are great designs, and M4 is a great, tough, good edge-holding steel. I don't really understand why these are considered beastly though? They don't have the extreme fine tips of a Mili or PM2, and I certainly do not consider them delicate, but they are not "beastly" or heavy duty like a Cold Steel SR1, a ZT 620 or 630, or even a spyderco southard (to name a few blades I own and like) for comparison. OTOH, the GBs are better cutters than any of these, heavier-duty blades.