Has anyone used it? We are taking a bowfishing trip this spring to LA and I was looking at getting the bluecharts chip for my Garmin 178 chartplotter. I've never viewed any of the detail on the bluecharts and was wondering if anyone who has could weigh in on how helpful it is. We are gonna be bowfishing the brackish marsh areas between Lafitte and Venice and it looks pretty overwhelming. Can't wait to be able to fill a cooler while bowfishing with good eating fish though.