I recently purchased this as a gift for my wife to use in her car that does not have a casette deck, nor extra auxiliary inputs.
Having dealt with a similar technology with my Deplhi XM portable player (XM2Go)for my car, (and having pretty good luck with that), I thought this would be a no-brainer.
Unfortunately the other reviews led me to believe this was going to be a gamble, and so I went for it, and returned it shortly thereafter.
While the device appears to be a simple hook up, and instructions were straight forward, I knew I was in trouble once the device kept changing its mind on the optimal FM channel. Now I read the reviews stating to have the radio 'OFF" at first, and even the manual suggests this, so that the device coudl find an optimal channel. Well first try it was 105.7, then it was 89.3, then it was somewhere in the 90 range; meaning it jumped all over the place in a span of under 5 minutes.
Some channels it chose were not free at all in my area, as there were clear as bell radio stations coming in on those frequencies. The few actual 'free' channels it did find and I was able to tune my stereo to were horribly dissapointing. Static and hissing were atrocious, no matterhow I manuevered the Zune or the cabeling. A far cry from my XM FM transmitter experience.
And then when we turned the car on, we noticed it got worse, very much like an old CB radio suffering from EM interference.
The sole reason I give this two stars is the nice and simple interface, the very well lit and sharp display, and the idea of the magnetic clip...all great ideas and useful....if only the device performed.
Granted I live in the burbs of a large radio market where free channels are rare (unlike the midwest), but the bleed-over, static & hissing, and random 'optimal' channels have me scratching my head.