The GA-B2100MF-1A is a solid everyday G-Shock that nails comfort and wearability, but it’s let down by a few usability issues that stop it from being great.
Pros
Very comfortable on the wrist, easy to wear all day
Clean, simple dial with excellent hand visibility
Lightweight without feeling cheap
Classic “Casioak” styling works with almost anything
Cons
No automatic backlight activation, which feels like a step backwards
Backlight itself is fairly weak and not very useful in low light
Negative digital display is hard to read unless lighting is perfect
Buttons are small and a bit fiddly, could definitely be larger
Verdict
If you’re after a tough, good-looking everyday watch with great analogue readability, this does the job. But if you rely on the digital functions or often use the light, you’ll likely find it frustrating.