Why this is not even worth 20$ (Tobyrich Smartplane Pro)

(currently the whole set is 120$, while the included Eachine Goggles are normally 99$) Dont get this plane here:
I've seen a few other reviews - all had the same problem - Bluetooth connection for an FPV plane? Seriously? No range concerns while desinging this? Also: the Android app (or just my Galaxy S7?) has problems even in close range with dropouts. iOS app and iPad looked more stable.
Video transmission is OK, but the APP has to enable it (took me some time to figure this out).
Goggles are good. This is my first look thru those quite popular Eachine EV800D. Diversity, DVR, just the limitation to raceband only is unneccesary! Maybe this is hackable?
!DISCLAIMER! - Bangood sent me this product for review.
7% off for Toys Hobbies and Robot： Toyho
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