Easy to install in my 55 plate clk. Transferred my phone contacts. Can use the phone on the steering wheel controls. Must have the radio on for the phone to work, which is no big deal. Idea for hands free use. Can also charge your phone with the correct charging lead as there is a mini usb connector at the end of the adaptor.
Replaced my old blue plug system with several of these, including the Wi Fi booster /extender. Easy to install and pair but have suffered regular signal drop outs, which were not found in my old system..