Instalation was pretty easy. There is a coupler in the antenna lead right behind the glove box door. Unplug, plug one lead into the lead going to the radio, and the other to the lead going to the antenna. Then decide where you are going to locate the converter box. I located mine under the radio, behind the Heater-A/C controls as there was a large cavity there. Find a power source, I used the keyed feed to the radio, this way it's off whenever the key is off. Ground where ever... I used a bolt going into a metal bar going across behind the dash.
I took a couple of pics of the "after" installation. The switch and line in jack were in a little plastic mount, designed to be affixed with double-sided tape. I didn't like the looks of it, so installed it differently. A bit overboard maybe, but I hate the "unfinished" look and didn't trust the double-sided tape to last too long. In retrospect, I would have mounted the switch and jack in another location. There is a plastic bracket that supports the 4-way switch and pass. airbag lite behind my chosen mounting place. I had to remove quite a bit of plastic to make room for the switch and jack. I don't think it will hurt anything long term, but time will tell.
I am getting a bit of a whine occasionally so am going to move my ground point, and also ground the metal box that contains the modulator and see if it makes any difference. It's not engine noise as it's there with, or without, the engine running.
Other than that, I'm satisfied with it at the moment.