Last year I shelled out 700 Euros for a Garmin Overlander off road navigation unit. I wish I didn't. The hardware is very nice - essentially a rugged Android tablet with a well thought out mounting mechanism.
But the software side ... oh boy. The "Garmin Explore" service this device is intended to work with looks like something from 2004. I mean not a finished product from 2004. But a proof of concept or minimal viable product from 2004. Usability is terrible. Planing trips/routes on the device is torture. Using the web interface isn't much better. (I'd link a screenshot but the service seems to be down ... again lol).
Sync breaks all the time. It's triggered by "bad" filenames for the .gpx files. Some special chars seem to break syncing so bad that the device won't sync at all until you delete the offending file in the cloud - but there's no error message. One day you just wonder why your recent route you planned in the browser isn't on the device. So you go to the sync tab and there's a message like "Last sync: 3_weeks_ago". Have fun fixing this as a normal person. (This bug also comes up when a route has a wrong count of waypoints ... it's not too many waypoints, it seems to be a number between too few and too many). I only figured this out by accident. Garmin support told me to reset the device and make a new account. (Which meant I lost all my tracks).
Now if Garmin did work on the software and provided updates I wouldn't be so salty. But there has been 0 improvements to the software side of things since the device was released like 3 years ago. ZERO. All you get is map updates which are for the street navigation side of things. The "overlanding" part? Forget it. There has been 0 bug fixes, 0 new features, nothing.
I guess you're supposed to buy the new (more expensive) Garmin device that recently came out. As if I would give Garmin one more Euro.
It's not even incompetence. It's maliciousness. They have a line up of wireless cameras (which you mount to your vehicle's bumper, etc). The cams connect via WiFi to the navigation device. Recently Garmin released a new camera - one which I'de find rather useful as it's small and works completely via battery and you can clip to the license plate. So you don't have to wire anything and can take it easily off when you don't need it.
But guess what - not compatible with my 700 Euro Android Tablet that could be made totally compatible via a software update if Garmin just wanted to. If you want to use the new cam: Buy the new 1200 Euro navi model. Oh, btw. some of the the older cameras won't work with the new device ... so you better buy a new set of new cameras.
I hope Garmin goes bankrupt. Sincerely.
/edit: I switched to the Gaia GPS app running on an iPad mini. Waaaay better experience.