Instruct: Classify the given Amazon review as either positive or negative.
Query: Not Just for Bicycling

This simple devise works as advertised. I easily attaches to either glasses or a hat brim. The reason I purchased the devise is not for bicycling. I thought it might work as a rear view mirror for my row boat. Although it takes some practice, I works well and it cuts down on neck strain during long rows. Highly recommended.