Flashing the wrong firmware can hard-brick your device. Always open the box (4 screws under rubber feet) and check the PCB.

After flashing, immediately check:

This is where the enthusiast value shines. Several custom firmwares attempt to skin the tablet-centric Android interface into the "Android TV" Leanback experience. This transforms the clunky mouse-and-keyboard interface into a sleek, remote-friendly TV interface. However, for the RK3228A, this is heavy lifting. The processor struggles to render the translucent overlays of the Android TV UI. The "top" firmwares in this category are those that disable animations and background processes to keep navigation smooth. When done right, a $20 box can feel like a $50 device.