Casio DW-6600vsCasio GBA-400

Owners widely praise the Casio DW-6600 for its functional module, featuring large digits, bidirectional scrolling, and on-the-fly 12/24 hour switching, with a unique target time feature and a beloved 5-second countdown indicated by arrows. It is also noted as the first G-Shock with a full electroluminescent backlight and has a history of documented use by SEALs, with some owners finding it difficult to see other G-Shock models as an improvement. Date numerals are larger than the DW-6900's, and some enthusiasts wish it were still in production, though others dislike custom backlight graphics for reducing legibility and find the 60-minute countdown timer limiting. The value on the pre-owned market is inflated due to its association with Chris Kyle and collector preference for "Made in Japan" versions, despite no functional differences. Overall, owners rate the Casio DW-6600 highly for its functional module and historical significance as a G-Shock favorite.

Owners report the Casio GBA-400 is a rugged, 200m water-resistant Bluetooth watch that allows remote music control from a smartphone. The watch has demonstrated remarkable durability, with one owner noting it looked brand new after five years of use and various tortures. However, connectivity issues are noted, with one owner unable to connect to an iPhone and another reporting the app does not work with Android 12, while Bluetooth connectivity can be inconsistent and music controls may not work with all phones. Some owners also flag the crown as fragile, with one reporting it broke and required repair. Overall, owners rate the Casio GBA-400 highly for its durability and ruggedness, despite noted Bluetooth connectivity and crown fragility concerns.