We just finished our delivery of our new to us 38 Tiara from Lauderdale to St. Petersburg FL. We used the Ipad with Garmin download as a 3rd backup. When it works, it's fine. However, 3 times during our trip back it just froze...no notice, no warning just stopped ! I rebooted several times to no avail. I purchased the Garmin GLO as the GPS receiver, and that seemed to work great. It showed there was always signal to the Ipad and the Ipad always showed connection with the GLO. I will look into this further, but I would say that the software it is unreliable. The active captain interface is a great feature although I found some of the warnings of shoaling unwarranted.