I have the original C2, not the Max version. And, it too, has been excellent. It might leave a little to be desired for espresso, but for everything else it's great.
Easy to grip so I guess a 10. The body is knurled so it doesn't slip in you hand, the knob on the handle is large enough to grip easily, and the arm is long enough that it doesn't take a lot of force to turn.
I've enjoyed my 1Zpresso K-Max, although in retrospect getting the blind shaker design in the magnetic catch cup of the K-Plus would have been nice. The external adjustment with detents was a selling point for me, despite it having a slightly coarser adjustment than comparably-priced manual grinders.
For what it's worth, I have a J-Max and hate the magnetic catch cup. It used to come off while grinding probably 10% of the time. I now leave a strip of electrical tape on it to keep it on while grinding.
I really enjoy the heptagonal 1zpresso Q2 for Aeropress and V60. I picked it because it fits inside the Aeropress plunger and seemed better than other grinders at similar price range in AliExpress. For these use cases grinding is smooth and not slow, and if I have to nitpick cons: removing the handle leaves it open, so I am planning to 3D print a cap, and the numbers on the clicking system do not align with the actual zero so you have to count clicks, or remember where the zero point is. If you pick the Q2S, the handle will also fold. If size is not a constraint, also consider Kingrinder K2/4/6, seem like good options.
Depends heavily on your budget. TImemore C3/2 and Kingrinders are great value options. 1zpresso has some nice options if you're looking to spend a bit more.
I love 1zpresso's grinders. My JX-Pro is a real legend but there are different grinders for different types of coffee. For example, the 1zpresso ZP6 (which is back in limited stock) is largely considered the best hand grinder for modern speciality filter coffee.
I have a Kinu m47 which I've using for 4-5 years now. I do use it for pourover exclusively so I did shell out extra for the pourover burrs that they have but I can't complain about the cups that I've been getting out of it.