We bought this watch for our boys to use for diving.  They have since used it as an everyday watch as well.  It worked very well for diving.  They could see underwater what they needed to because of the illumination capabilities.  The numbers and digits were big enough to see easily.  We also liked that it had a movable bezel so that they could set it to the time they entered the water and keep track of how long they were diving - an "old fashioned" backup to the computers. They like it for everyday use as it is not that heavy a watch.  I gave it a "4" only because the watch is still new, it has only been used on 6 dives, but it feels like a very sturdy watch that will last them a while.  The band is pretty sturdy as well.  One son did complain that the band dug into his arm a bit, but I think that should soften with time.