Hey boys; I just installed the HogTunes 3-Way for the Freeway system in my new 2010 FLTHX (Electra Glide Limited), and WOW! You were all correct, this made a major difference in my sound system.
All plug and play, and the install with the exception of drilling two holes, was effortless. I did have to think about the cabling to the battery from the front, but I just went under the gas tank faceplate as instructed, and no problem, it looks factory installed.
I showed it off to my local Harley Store owner, who was so impressed, he has now purchased one as well for his Ultra Classic. I have the HD Zumo 550 with XM Radio and I installed the Intenna under the Bat Wing near the front upper right side. It seems to get very good reception there, and I have increased the device output to 100% which puts the Harmon Kardin radio at about 1/3 for volume, which is very nice.
I also increased the other Zumo audio outputs to 100% so I can hear the cell phone ,and navagation instructions. This all seems to be working just great.