I couldn't stand the legibility issue with GW-9400-1B (even on broad broad daylight!). Bought a positive display version GW-9400-1 yesterday. I'm happier now! Here's a picture of them next to each other
Casio GW9400-1 Review | Tested by GearLab
Casio GW-9400-1ER | Helveti.eu
Casio G-Shock Black Master of G Series Rangeman Watch GW9400-1 – NAGI