Instruct: Classify a review into positive or negative sentiment.
Query: Disappointed with basic navigation

I had the opportunity to compare the Lowrance iWay 350C side-by-side with the Garmin 340C (I owned both). I found that despite having a lot of nice extra features, e.g., mp3 player, considerable configurability, the Lowrance fell short in the basics of navigation. The satellite acquisition time took much longer than the garmin, and the lowrance frequently had to update the route. Most importantly, the Lowrance offered navigation information that was incorrect, e.g., left turn where no left turn was possible. Because the Lowrance 350c failed at the basics of navigation (compared to the garmin c340) I returned it. If Lowrance can update the maps/navigation software to be comparable with the Garmin, it would be a unit worth considering.