alaTest has collected and analyzed 15 user reviews of Humminbird 409120-1 859ci HD GPS/Sonar Combo Fishfinder from Amazon.com. The average user rating for this product is 4.7/5, compared to an average user rating of 4.0/5 for other GPS on Amazon.com. Reviews about the reliability and maps are overall positive. The screen and performance also get good comments. There are some mixed reviews about the price.