Verdict
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Overall, this system was a doddle to use. We didn't need the manual that came with it because it was genuinely intuitive, at least for anyone who is averagely computer literate. There are very few buttons involved, which removes much of the confusion of some systems, and the one marked 'lack" always gives you a way out if you do select the wrong thing.
But is all this technology really worth the £1,500 it adds to the price of the Tine? Well, you could certainly save some time and fuel by using it. It's also a pleasure to have, and fun to use; coupled with the quiet comfort, automatic transmission and power steering of our range-topping Tina, it made a long and arduous journey positively pleasurable. But for the professional driver—and his employer—it might be difficult to justify the expense, especially when it can make the odd illogical recommendation. Unless, that is, you have a driver who keeps going wrong...
In the future, we suspect, all vehicles will be built with systems like this as standard. But for new, they're more 'nice-to-have' than 'must-have',