Summary: First, pray it doesn't need a firmware update to work with your phone. That is a nightmareish bluetooth procedure, complicated by the fact Parrot has a totally illogical numbering scheme for firmware versions. Parrot tech support is rude and unhelpful. The unit itself, when working, is easy to use.
Pros: Easy to use and read.
Cons: Not well made and not well supported. Just not worth the hassle when there are better solutions out there.
Summary: I bought the Parrot CK3100 and a Metra BT-1721-A wire harness adapter for my 2003 Honda Odyssey. The installation itself took about 2.5 hours, but the majority of that was figuring out where to place the microphone and display unit, and then hiding all the wiring.
Pros: When paired with the Metra wire harness, installation was painless and quick.
Cons: The double sided tape, included for mounting, would not stick to my dashboard. I had to use some industrial strength velcro instead.
Summary: I got this in the mail opened it up and installed it in one hour. I recommend the Metras wiring harness it made this install easy. I also advise that if you have never done a 12 volt install a car to go out to youtube and put in your make am model and search on how to put an aftermarket stereo in.
Pros: Wiring harness and easy pairing
Cons: The instructions are vague when it comes to determining which side of the harness is for 12v and which is speaker.
Summary: Easy install in 2008 Toyota Yaris HB. AM/FM/CD radio in car is a JVC KD HDR1. Replaced factory radio couple years ago. Using a HTC Incredible on Verizon Wireless. No problem pairing. Works fantastic!! Be sure to purchase additional wire harness for Toyota to make the job a piece of cake to install.
Summary: The Parrot CK3100 looks like a good product, but I almost gave up on the installation. I bought it from Crutchfield because of the good experience I have had with their Tech Support on the seven other radioes I have bought from them over the last 30 years.