Great hunt! A really useful device! Here's my opinion on that:

Pros:

• It allows you to monitor your exposure to the sun, that is, it really prevents you from getting cancer. This makes it a vital product.
• It goes unnoticed in bags and purses. It is ideal to take one on excursions where you will spend a lot of time in the sun.
• The price is ideal. $19 to prevent something as terrible as cancer is worth it.

Con:

• If you're not carrying a bag, it's very unlikely you'll be able to transport this device. Unless you hold it in your hand all the time, which is not ideal.