I have it also. It does have its problems. Maps are reasonably good but when I've saved tracks/routes via my iPad I can't see them on other devices without downloading the actual trip data file straight from mudmaps website. It also has some issues when zooming in and out at times, all of a sudden it throws to the ocean or another country.

IMO it is a tad overpriced. Would have been good for half the price I paid for it. Also not the easiest to plan upcoming trips. I would say it's not real user friendly. It can be improved in a lot of areas.