The Parrot CK3100 is the most popular Bluetooth hands free system sold of all time, due to it's simple display that gives you a choice to dial your contacts or see who is calling you it's the perfect choice if you don't require any music streaming. The Parrot CK3100 had a face lift around 2 years ago due to the screen colour being a light gold and it didn't really match many dashboards at that current time so they changed the display to matt black which looks very sleek on your vehicles dashboard.
The only downside to this Parrot kit is no multi point which means only one phone can be paired at any one time. If you have a personal and work phone you should be looking at the MKI series of handsfree bluetooth music kits. The Parrot CK3100 is updated very couple of months with the latest firmware and a Parrot Certified engineer can always update your software if needed.