Is it worth it? Absolutely. The RK3188 on exclusive Android 5.1 outperforms many cheap Allwinner H3 devices on Android 7.1 due to the superior Cortex-A9 architecture.
: NuPlayer becomes the default streaming player, and there is improved low-latency audio support for better performance in professional audio apps. Android 5.1 Update - PUMPKIN CAR STEREO SUPPORT CENTER rk3188 android 51 firmware exclusive