The first real adventure (or actually dual-sport) bike that I bought was KTM 690 Enduro R.
It was April 1st 2016…

I didn’t have a proper GPS device to do the navigation when OffRoading with this bike. I was trying to manage with TomTom… But that just didn’t work! So the first proper GPS was
Garmin GPSMap 64
Pros: Easy to use, works with AA batteries, No bugs
Cons: Difficult to use (no touch screen), Very small screen and not very bright

Then the second device was Garmin Montana 600
Pros: Very easy to use (Touchscreen)
Cons: Problems with charging, not very bright screen

Third was Samsung Active Tab 2 with Osmand App
Pros: Super big screen, Osmand is very good App
Cons: Problems with charging, didn’t like the Osmand maps

Then I got Garmin Montana 700
I also made a comparison video between Samsung Tab and Montana 700
Pros: Easy to use, big screen
Cons: Problems with charging, Not possible to adjust GPX track line thickness

And then I got Garmin Zumo XT2
I made a comparison video between Montana 700 and Zumo XT2
Pros: Very bright screen, Very big screen, Very versatile and diverse to use
Cons: Maybe too complex menu, Too big screen resolution (thin lines on the ToPo map are not easy to see!)