I got a Kensington FM Digital Transmitter For iPod in the post today, so I was using that on the way into town.
I was worried about it being big sweaty balls because reviews of other FM Transmitters weren't good at all. I was deciding between this and a Macally FMCup, which fits into a cup holder. They're both powered by the cigarette lighter. I went for the Kensington on the number of actual reviews there were, nearly all saying it's great.
As one review said, there was some sibilance on the S sounds, but not much at all. I switched the EQ on the iPod to reduce treble and the hisses went away. Then I had to put the bass up on the radio by a notch or two. Once it was set up it sounded just like any other radio station.
I thought I had put it on a dead frequency when I first used it but as I was driving the cable got in the way of the handbrake, so I turned it which turned it off through loss of contact with the power points. I didn't realise because there was still some music playing loud and clear. It turned out to be another station that was being blocked by the Kensington.
It has some hidden frequencies at 87.5-87.9, which I believe are non-broadcasting frequencies as an overlap between the different frequency uses. I don't think it's legal to broadcast over those frequencies, which is why they're hidden. It's supposed to make sure there's some dead frequencies to use. It's useless for me because there's been a pirate station at 88.5-88.7 for some months.
The main reason I'm happy it works well is because it was kind of expensive at £30. I was in an electrical goods store on Friday looking at some FM transmitters. They had a Griffin iTrip for £40. The same one Play.com are selling for £18. I've heard mostly bad things about the iTrip. I wanted one that charges at the same time, for charging and also because they have more power to give a stronger signal.
10/10 so far.