This is an excellent small sheet grinder. If you’re doing larger volumes, obviously a larger grinder is needed. But for the traveler, a single pipe load, or smoker with a need for discretion and low volume, this is excellent. Strong steel, cuts well, and is slow to get slimed from damp flower. Easily cleaned with alcohol. Portable and, did I mention, discrete?
Never use plastic grinders, and the jury is still out on alloy grinders leaving small grinder traces in the grind. Steel grinders are not cheap, but always preferable for serious users.
The sheet grinder is low volume only, but the grind/cut size is very nice. My personal favorite.