That's exactly the sort of comment I come here for.

We retrofitted (i.e. hacked) AA onto my wifes 124 Spider. I've noticed it judders a lot when in satellite mode, but not in normal. Assumed this wouldn't be the case as it's essentially a video stream being played with touch events sent back and USB audio. Maybe some headunits are a bit underpowered for this?

That said on my Kia Cee'd it runs like a dream regardless, there is never a glitch.

Any more insight on the way AA and Carplay work from a manufacturers PoV?