I purchased the watch as I have a child with severe ADHD.  I use it to trigger him to begin packing his books at 5 minutes before his classes end so that he is not the last one out and last one in the next class.  It does help keep him focused.  and It notifies him when it is time for his afternoon medications.  Only reason i do not rate this a 5 is that there is no raised bumper around the crystal.  My Timex's crystal is "embedded within" the watch facing' thus the tendenacy is to hit that and not the crystal.  My son is rather oblivious to things, he's has the watch for only roughly 2 months now, and the crystal is horribly scratched as "boys will be boys."  I would recommend future designs follow the lead of the Timex "Ironman" regarding the embedded crystal.  The product is supurb in all other senses.