I've been using that in my car for a year, and I am quite happy with it. Its reputation is well deserved, I believe.
I have voice calls feed into my car stereo system successfully (Alpine X100), and the Parrot voice recognition commands are surprisingly good. My main phone is a Windows Phone, but I've successfully used the Parrot unit with Android and several old Nokia Symbian-based phones.
The moment I can buy a Windows phone with sufficiently large storage (probably 32 will be acceptable, compared to the 16 I have now), I'll finally dismiss my constantly crashing iPod 100Gb, which I've been keeping in my glove box basically as as a HDD for MP3s, and get rid of that last part of Apple-world from my personal music playing experience. Using Zune / Microsoft Music only in my car has been virtually impossible so far, but the Parrot unit is even helping to do that, which I can't wait for.