Yeah it's not the best, i'm still getting used to it. The bluetooth is a bear to setup. I still don't have it 100% right. The idrive wheel thing isn't that great - i keep nudging it by accident because my hand fills the entire grip so i can't help it. I don't even have that big hands!
On the plus side, it did save my bacon on the first outing by announcing a speed camera i had missed.
The routing seems ridiculously poor. E.g. i planned a route on my computer, sent it to the satnav and thought no more about it. I went to ride the route later on and had a quick look at the saved trip - it was a completely different path. I went back into the house, checked the route on the computer, re-uploaded to the satnav, checked on the satnav and it was borked again.
Turns out when you transfer a route from the computer, it doesn't actually transfer the route. It transfers some waypoints. My route had 2 waypoints, start and finish. The routing settings on the computer meant it would choose a nice route. The routing settings on the satnav meant it would choose a crap one.
Definitely a learning curve with this thing! I only got it for the idrive integration, but that is utter guff and not worth the £500.