I upgraded to the TIMEMORE Chestnut C3S PRO from one of the lighter-weight stainless steel type hand grinders because the grind was uneven and the wrench-style handle was always slipping off when I was trying to grind and hitting me. Although I could have purchased an electric model for the same price, I really enjoy the experience and ritual of grinding my own beans for morning pour over coffee dripped in a Chemex. Gets the body moving and uses natural energy!This unit is impressive. It's built like a tank with the precision of a Nikon lens! It feels like you are assembling high end camera equipment as you screw on the threaded aluminum alloy base. The handle sits solidly on top so it will not slip off. The foldable handle works smoothly though I don't have much use for that in the home kitchen. The textured base makes it easy to grip and feels like a the zoom on a camera lens.Beans grind very quickly and smoothly. It works better for me when hand held in the air rather than resting it on a surface. The grind quality is excellent...consistent in size with very detailed increments available on the dial. Although the instructions recommend using 13-16 clicks to get pour over grind, I found that was too fine and clogged up the Chemex. I have settled at 21 which drips well and delivers good results for my beans. The finer settings for espresso result in extremely smooth and even grinds.I read reviews of previous models which were generally positive but I was scared away by the numerous reports and photos of the composite plastic top cracking (the only plastic part in those models). The manufacturer took that feedback and now uses aluminum alloy for the top on this new model. So the entire unit is made of some form of alloy or steel. No plastic anywhere. This thing is built to survive World War III.The one negative and it's not a big one which is the trade off that comes with being built "like a tank" is it is heavy. Weighs about a pound. This does not impeded using it, in fact it might help keep it stable. But it feels a bit excessive especially in how thick the body walls are. For those who want to take it on the go, it will add weight to your load. If you are committed to hand grinding and appreciate a finely instrumented and constructed tool and have a bit of cash to spare, I highly recommend this grinder.