The -:
A slight lack of bass due to the overall size of the device, it does not disturb listening either.
No volume control buttons for voice "power on" and "pairing" of the enclosure ... not practical if it is used in the morning and want to be discreet ...
Supplied with USB cable but no outlet: it will charge from your computer or find an adapter (wall USB ports are not yet democratized).
Device in English .... which can annoy some users ...
Instructions in English only, but simple device to use.
In short:
An excellent price / quality product which I have sought to highlight some kinks, however it deserves a 5 star rating and satisfy any audiophile power hungry improve the sound quality of the tablet where it is! :)