alaTest has collected and analyzed 3 user reviews of Raymarine C90W 9-Inch Waterproof Marine GPS and Chartplotter from Amazon.com. The average user rating for this product is 3.7/5, compared to an average user rating of 4.0/5 for other GPS on Amazon.com. Reviewers are impressed by the size and design. The screen and usability also get good feedback. There are some negative views about the price.