Took a 79 nM cruise around Desolation Sound and the Discovery Islands in BC. Took me safely through some narrow rocky passages with awkward turns. Like the low price for Canadian and US charts and that they are not proprietary. Not hard to use compared to some other similar apps but there is still a learning curve. Plot your trickier routes before you are aboard. Had difficulty uploading logs to other copies of app. Only has email option as a way to transfer them. Did not work. Would also like a way to send a pdf of the routes I took to friends interested in where we went