I have had a Casio DW-290 for about about 16 years.I bought it when I used to do scuba diving. Every couple of years I would have to change the watch strap, as they break. However the watch is very robust & has never let me down. It still works & I can only ever remember changing the battery twice! When the strap broke again it was either £12 for a new strap of £20 for a new watch. I chose the new watch. The first watch in 1994 was about £39 so £20 is a bargain. I only use it for work too now. It was delivered within a couple of days too.