I'm sorry, this is a toy. You can try to be cute all you want, but this is still nothing but a cheap digital watch face/case with rubber-y bands (uncomfortably tight, especially if you have hair on your arms). If you really want a "modular timepiece" that you can customize, find yourself a good watch and swap out your straps. If you want a watch for exercising, there are plenty of options in that market that will provide you with many more options. At $39, this watch is an insult. I'm sorry to be so strong about it, but the fact that this product is being portrayed in a serious light is insulting to my intelligence.