While these features are robust for a budget device, manufacturers often release buggy initial firmware. Updates are released unofficially online (since official support sites rarely exist for generic boxes).
Most people search for "512M" thinking it refers to the storage space. It doesn't. It refers to the RAM size. The actual flash storage is tiny (usually 1MB to 8MB). 1509 dvbt2 512m firmware update
If you try to load a firmware file that is 16MB in size onto a "512M" box, you will brick the device (turn it into a paperweight). While these features are robust for a budget