Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Flimsy and poorly constructed

This product worked fine for three whole days. It provided UV index readings and calculated exposure time based on UV readings, skin type, and SPF. Unfortunately, the device was extremely flimsy and poorly constructed. It could not withstand the turbulent forces of being placed in a backpack with other objects. The screen became unreadable as ink splotched its exterior. If you care for the product like a new-born, you may have some luck with it.