The device itself is really simple in character and thus absolutely easy to use. I had bought it for my "rather not so tech savvy 'parents and had to help you set up and connect to the car. Went really well and quickly.
Sound is acceptable, even at higher speeds on the highway - for both sides. Even if the speech sometimes very tinny sounding and thus sometimes a bit annoying.
A pity, however, that the unit - despite phonebook synchronization - not announces the name of the caller, but runterleiert only the phone number. In times of mobile phones we know most numbers no longer by heart, ergo not know who is calling at the moment (maybe I'm just not make it, it set accordingly xD). But well ... for the price you can not complain, despite everything. Price - performance is satisfactory - that can be safely recommended.