Well thought out and reliable

I have two that I use for 1 year.
Speech recognition is bluffing.
The sound is good.
The microphone works best if you aim the lens hood to you.
Ambient noise is filtered, but there too the caller will have difficulty understanding you: make tests with a friend to get an idea.
Autonomy is too high (!) I forget to recharge from time to time. Information on the remaining charge is reliable (it is accessible by pressing the power button to bottom: easy!).
Power is micro usb, such as telephones.

I use it seamlessly with two phones: the voice recognition works only with the first who logged, active bluetooth so I manually to be sure of my shot.
The scope is excellent bluetooth (runs between the house and the garage!) Fortunately the system goes to sleep when the car does not move (by cons is a bit annoying in traffic).

The maintenance on the sun visor is excellent, but on one of my cars weight revealed that it is more plated ceiling.

Consider making regular firmware updates to once a company cares about its customers and offers regular shift, enjoy!

Surely a good product.