The Seiko Spring Drive Spacewalk

For those of you, like me, who can't read Japanese, toggle this featureon and off by holding down the illumination button for several seconds. The vibration function of the watch works sufficiently, though it's a little weakerthan I'd like. I was always able to feel the alarm, but the hourly timesignal vibration only grabbed my attention less than half the time. And if you wereplanning on using the vibrating alarm as a way to wake yourself up in the morning whileallowing your partner to sleep in, you will need to be one incredibly light sleeper.I think the GW-400J generally serves the purpose for which it was intended, however,which is the ability to keep track of time, events, and intervals while participatingin water sports when wind and waves would keep you from hearing a faint high-pitchedbeep. The GW-400J doesn't have the standard G-Shock illumination button on the bandlike just about every other G-Shock I've ever seen. The upper right-hand button activatesthe electroluminescent backlight instead, which gives the watch a non-standard G-Shockbutton configuration. The only real disadvantage is that the backlight is slightlymore difficult to activate in the corner, and you have one less buttonto use to interact with what amounts to a pretty complicated digital watch. Givenmy choice, I would rather see it in it's familiar G-Shock position on the band,freeing up the top right button for more important functions. The intensity of the backlight is sufficient. It can be set to active for eithertwo or three seconds, depending on how stingy you are with your battery.