[DanP]

I used this app extensively this summer and have been very happy. I have an iPad 2 with 3G (purchased this because it has GPS -- and you don't need to subscribe to a wireless plan to use this built-in GPS) as my primary chart plotter. I use this mostly at night or in areas where I don't know well. Sits right on my console when needed. I can also run this app on my iPhone 4S with the same functionality but smaller screen. Works well in a pinch. Also provides a speedometer. You purchase this once, use on multiple devices, and get free updates to the Bizer map. Absolute no brainer, especially if you don't have a dedicated chartplotter. Still carry the physical Bizer map but I am much more confident navigator -- and made my boating more fun this year, especially at night.