Do you have any shots of how you installed the microphone/controller? How is the audio quality to talk?
My 06 LR3 has the aux input and 12V power port in the same place.
If that's the case then you are good to go as far as power and connectivity to the LR3's audio system. The Kinivo comes with at least 3' of very thin cabling between the power plug/audio plug and the dash-installed controller. It was easy to use a credit card to push this section of wire into seams around the lower dash and along the driver's side of the center console to get to the back ports. You might be able to use double-sided tape at intervals along the wire if you really wanted it to stay put but I have had no problem with the friction fit I described.
There are only a few minor cons with this installation. You won't be able to lower the cover on the rear ports to hide the plugs. If you have small kids or frequent passengers in the back, it could be kicked loose even though it is tidy when plugged in. You also lose the use of that center console rear power port, although it does provide a USB passthrough so a rear passenger could still charge a device that way.
The installation of the mic/controller was literally a peel and stick affair. Being a bit OCD I probably spent a full 3 minutes instead of a more reasonable 10 seconds deciding where to attach it.

I put it close enough to the Start/Run button so that I could easily get to it by feel, but not so close that I would be trying to start the LR via the BT controller. See photo.
Audio quality is indistinguishable from the onboard telephone BT and on par with high quality built-in BT systems I've had in other vehicles. I did several side-by-side comparisons and no one could tell any difference in my voice during calls. Of course the other party's voice comes out over the LR's speakers. Obviously audio quality is influenced by where the mic/controller is located. BT streaming of music from my iPhone 5 is also excellent and the primary reason I purchased the Kinivo.
Ergonomics: The LR's audio system needs to be on the AUX setting in order for the Kinivo to work. As mentioned, you can't control your phone calls or music from the dash or steering wheel controls except for volume. You lose the caller's info popping up on your display. Once I get a Spotify playlist going, it is super easy to advance or rewind a track with small buttons on the top rim of the controller and I can do this by touch while driving. Pressing the large central button controls the start/stop of music and can also invoke Siri or put the device in pairing mode depending on the number of taps.
Only issue: Every so often I have found that a call won't go out (or be able to be picked up) by the Kinivo. I have not identified the factors that cause this and it is very uncommon. It may be user error. I can usually tap the central button randomly to get it to activate, or select the device from the Audio Sources button that appears on the iPhone during calls. Most of the time it works perfectly.
At $35 from Amazon, it is the one single mod that I will probably get the most use from and the most bang for the buck. Give it a shot! --Chris