Thanks to all for their contribution. I decided to take it. Firstly because it is one of my business tools, the cost of even relatively small items that do go wrong can soon add up and equally important peace of mind. Its the Honda official extended warranty and covers is as good if not better than most third party insurers.
Next I need to take on Honda office on GPS updates - I notice there has been correspondence elsewhere on the issue so I am not Robinson Crusoe in my disatisfaction on missleading sales babble whne purchasing the car new!!