I purchased this app this week. *I also recently purchased a new boat and have yet to install my Garmin GPS. *I have decided that I'm not going to bother. *This app is the best $35 I have ever spent! *Using the large screen iPad was great, and the bright sun was not a factor! *I noticed one bug and emailed Brad. *I received an immediate response and the bug was fixed! *I would highly recommend this app!