I mainly want to get a coffee grinder because beans have a longer shelf life and are cheaper. If I also get better coffee, that’s a bonus! (Basically, I’m not looking for a premium option)

What is something I should pay attention to when buying a grinder. I see people mention “flat burr” grinders all the time. Is that something important?

A few years ago I bought a cheap terrible manual coffee grinder off Amazon. It took 5-10mins to grind my coffee. The grounds where too course and my hands hurt. Is the experience better with higher quality manual grinders? At the moment, I’m not a huge fan of manual grinders because of this experience and am leaning towards buying an electrical one.

What makes a coffee grinder better than others? What is the difference between premium and budget options?