I already own the Hydrogen, which is super comfy and fits perfectly size wise. I needed a solid mid hiker for high-mountain backpacking and off-trail hiking in general. I prefer the leather uppers for longevity and maintenance. The Zodiac fits absolutely perfectly and is so comfortable right out of the box. The stiffness is also perfect for what I need it, rough terrain, but I don't feel they are overly stiff like mountaineering boots. I have a slightly wider foot (not enough for a wide, though) and the slightly wider toebox is great. I have worn it on some varied, muddy, rough terrain and absolutely love my purchase! UPDATE after putting them through the wringer: This is BY FAR the best and most comfortable hiking boot I have ever owned, and I've owned a few. The traction and stability is amazing! I truly love this boot!