Just having navigation is not such a big issue as almost anyone who can afford a new corolla can easily buy any branded gsm tablet with latest navigation running though it along with other handy features. The thing missing in these Chinese build players is *
(1) High end Audio processing
(2) Lcd panel is not even full HD i.e 1920x1080 (2.1 megapixel) which is now considered old technology as even Korean build cell phone displays have much better resolutions now i.e (Samsung S6 & LG G4) screen resolution is (1440 x 2560)
(3) Surround sound is decades old now but still no signs of it in such players.
I can go on and on but its late and i have to catch some sleep so more complaints later.