I guess I'm a little late to the party, but I had to put in my two cents. I bought the DLO trans dock, and it didn't work worth a crap. I live in Houston, so pretty much every FM frequency is full of garbage music. I did find a station that it would pick the Zune up from, but it sounded far worse than AM quality.
I returned it and bought the Zune car kit, and the sound difference was astounding. Most days it's better than FM quality. There are times that the signal is cut off by other transmitters in other cars, or around toll gates. It's worked well on road trips to Corpus Christi, Dallas and Austin on the same frequency.
The next car I purchase will have to have an MP3 player jack so I don't have to worry about this crap anymore.
