I use F-91w and others like it for a long time. I bought it spontaneously and am very excited. The watch itself is of better build quality than current stocks from Casios or Timexs in this style, with a better lighting mechanism and what appears to be a more scratch-resistant dial. I haven't tested this in water yet, but I have no reason to believe it won't work. The keys give a satisfying click without being soft. I have a snap, a version of a metal band, and as far as it goes the band is definitely a weak point. It's cheaply made, cheap-feeling tape that tugs on hair and doesn't feel like it will hold up over time. However metal straps from Casio or Timex are no better in this price range, it's just what you get on cheap watches so I don't blame them. You can easily exchange it for a group of your choice. If you hesitate, I would say go for it. This is a great watch and if you're not a die-hard Casio collector it's a great inexpensive alternative.
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