Humminbird 581i 5-Inch Waterproof Marine GPS and Chartplotter with Sounder

alaTest has collected and analyzed 38 user reviews of Humminbird 581i 5-Inch Waterproof Marine GPS and Chartplotter with Sounder from Amazon.com. The average user rating for this product is 4.2/5, compared to an average user rating of 4.0/5 for other GPS on Amazon.com. People are impressed by the durability and design. The price and usability also get good reviews, whereas opinions are divided on the screen.