Tonight, after hooking it up to an old motorcycle battery, I had a bit of a play with the new screen...
It wasn't overly hard to pair up to my phone & helmet once I decided to finally consult the instructions...
Anyhow, it's so much better than the old one.
The screen is more sensitive, there's an on/off button which the old one lacked, and overall, just more user friendly.
I also like the fact that it has separate volume controls for media & phone.
Now, I just have to get around to installing it...