Looking to buy a navigation tablet with pre-installed Marine Navigator app. Is that any good?

Just wondering how good that app is. It's not in the google store since a very long time now. But pictures of it look fine.
I've been using the Marine Navigator app with Admiralty raster charts from VisitMyHarbour website on Android tablet for 10 years and will continue to do so. The process of getting the charts loaded into the app needs a few button presses and a purchase code to be entered but it is not difficult. If you want to bypass this then you can buy a tablet from London Chart Plotters with the app and charts already loaded. The app works well with routes easy to enter and follow. Also has AIS overlay.
 
Agree with all the above , had to go back to vmh a few times to get it up and running but they were extremely patient and helpful . Old tablet starting to cause a few issues and of course app only runs offline on mine due to the issues mentioned elsewhere but use it all the time ..
 
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