I purchased this watch in order to keep track of my rest in between exercises at the gym. I had a watch with a non-rubber strap but I worried about the germs / pathogens that could be left on the strap after a long days work/ exercise/ general activities. I would have given this watch 5 stars but the lack of illuminecense has rubbed me the wrong way thus far. There have been plenty of incidents where I could have used a low light/ no light capability and this watch does not answer that call.