Hmmm, just realised that I haven't followed up on this since last year and quite alot has changed.
I took the unit, as my main GPS, on a roadtrip to Slovakia, Romania and Serbia during July/August. I started to have so really strange problems in that the whole screen would re-draw every few seconds, it would flip between portrait and landscape mode (on screen) even though it was locked in landscape, and it would slowly lose charge despite being plugged into the bike power supply. The power problem was the key to teh solution. It appears that the charging connectors through the mount does not work very well. When I connected the normal micro usb connector to power, all the issues above stopped and the device charged to full power during use. Simple fix but somewhat annoying too.
On the whole, I am really happy with this Active Tab1, though have since upgraded to the Active tab2 that was released in November. Its a more uptodate version with more memory and processing power which shows in both the device speed and what you can have installed on it. I haven't bothered to try the mount charging again as I am happy with a 90 degree bend micro usb to do the charging from an onboard waterproof usb socket.
On a practical note, both devices will take a sim card so a local sim can be added leaving your home country SIM in your phone. The actiive tab 2 is a really practical touring device that removes the need to take a computer to stay in touch and do route planning/loading.
I am going into semi-retirement at the end of May and plan a 6-12 month trip across Russia/Mongolia starting in June. There is a strong possibility, money permitting, that I will then ship Vladivostok to Valpariso in Chile. Could be there for the 2019 Dakar! I'll try and remember to post any issues, if any, that I find with extended use.