Summary: I've had 2 of these. The first worked brilliantly then after about a year or so it just stopped working, I thought for $90 it'd have more life in it. None the less i was happy enough to fork out the cash for another one. The new one has been working for about 6 months and now has simply decided to work intermittently some days i'll get perfect uninterrupted sound.
Summary: Bought this is June and it worked fantastically for about 4 months. Then it started getting super static-y all the time unless you were driving on VERY open highways. It got to the point where it started cutting out a lot, even if it was on a 'good' station. And then today it just stopped working altogether. I have no idea why. Anyway, it only lasted me 7 months, which was a disappointment considering its price.
Summary: I tried using this product in my Mercury Sable and was very disappointed. The TuneCast transmitted a very weak signal and I was running the volume at around 80% just to hear it. My antennae is at the rear of the car, so that might account for the poor reception, but overall, it's a piece of junk. I would never think about purchasing this product again.