Write down your main brewing method, your usual dose, and how often you switch beans. Someone making one filter coffee each morning has different needs from a household preparing several espresso drinks. A broad list of advertised grind settings does not tell you whether the useful adjustment range suits your method.
Compare the practical details: access for cleaning, a stable collection cup, replacement parts, and clear adjustment markings. For a hand grinder, consider the effort and time required for your normal dose. For an electric model, consider counter space, noise tolerance, and whether the supplied hopper matches how you portion coffee.
Ask a seller to explain retention and the recommended routine when changing settings. Avoid translating a large burr diameter or a powerful motor directly into a cup-quality score. Read reviews for their method and limitations. A well-documented comparison with consistent beans is more informative than an unexplained numeric rating or a claim that one grinder is best for everyone.
The conversation
A good question can make a better brew.