The experience has been quite smooth so far! I have a few suggestions though:
First of all, there needs to be an option to make the navigation bar larger. Currently, it is very small and unadjustable. This makes it dangerous to use while driving, and just difficult in general. It seems I'm not the only one to have brought this issue up, it needs to be manually scaleable in the settings menu.
Second, this is a little picky, but it would be nice to have the ability to change your ringtone in the bluetooth phone app. Even after installing duduOS, the ringtone for the head unit stayed the same, and I am not able to change it through the app, or through android system settings.
It's been a great user experience overall so far, definitely better than the stock os on my head unit. Good job!