Customer Reviews
Almost everything I wanted. 
2008-06-14
I needed a transmitter for my new shuffle, and wanted something that had the ability to charge it. Unfortunately this can't charge and play at the same time, but I don't think any can b/c the shuffle charges via the headphone jack. I love the fact that you can set it to the international mode, the radio in my van gets the lower channels that most don't (87.5-88.1) so i get no interference. My biggest complaint though is that I have to turn the volume on the shuffle so high that it gets distorted on louder songs, but if I don't the transmitter turns off on softer songs. Aside from that it's the best transmitter I've owned so far.
Not a fan... 
2008-06-10
I think FM transmitters are a crap shoot. Some will work better in certain cars and certain areas. This one did not work well for me (04 Mustang, South NJ). Someone else I know had this one also, and it didn't work well in their Mazda Tribute or Toyota Camry. The signal was very static-y on every single frequency I tried. I eventually bought one by Monster and I love it.
Could be great, if it worked 2008-06-01
The iTrip Auto Universal+ could be a great product, if it actually worked. The auto-off feature works so well that unless you have your MP3 player cranked and are listening to loud music it shuts off after a minute. It also has fairly weak output compared to similar products. The good features are it can broadcast on any station, has presets to remember the best frequencies to broadcast, and it can charge your MP3 or other devices through its built in USB power connector. Now, if only I could find a product with these features that actually worked.
Worthless Piece of Crap 
2008-05-31
This device is utterly worthless. I bought one for the car and any music that I listened to with any thick textures was hardly recognizable. Lots of static, lots of noise, horrible. Also, the cigarette lighter plug would come unplugged after going over bumps in the road. It's amazing that I didn't kill myself or someone else between Boulder and Denver while trying to find a frequency that didn't make Modest Mouse sound like screaming zombies. This might work OK in the boonies where there aren't a lot of closely spaced radio stations, but if you plan on using this in the city buy something else.
No Good for Podcasts! 2008-05-30
I bought this so I could listen to podcasts in my car. Unfortunately even with the sound at the highest volume, this iTrip would decide there was no signal and turn itself off. It worked fine for music, but with podcasts I had to turn it back on about every 30 seconds. I returned it. To bad because the sound was pretty good and it worked well other than the power off "feature."
Nice Features, Horrible Quality 2008-07-24
I bought this product for 60 bucks at radio shack so that I could charge my mp3 player in the car and listen to it without using all my open cigarette lighters. It features a USB charger, an FM transmitter, and a nice backlit lcd screen to change the station with. However, this device gets too much interference and I find myself constantly searching to find a clear radio station to try it on. even the smallest bit of static will garble this thing up. I ended up just throwing it in the trash and continued to use my old $10 transmitter I got at meijer. While this Transmitter struggles to overcome the tiniest bit of static, my cheapo one can operate with decent quality, and I don't even have to search for an unused station. Yes, the cheapo non-brand transmitter has enough strength to block any interfering signals out, while this one cannot. My advice, don't waste your money and go with somthing else.
For God's Sake, Use ISR! 
2008-07-17
I love this product.
I bought the "Powerplay Pack", which features the Griffin iTrip Auto Universal Plus FM Transmitter, their PowerBlock a.k.a teh wall charger, something called the California Roll, and an iPod cable. It was priced at $60, and it was on clearance for $22. A deal, right? I took it out to my Honda Accord EX and turned the thing on. Horrible. Sounded awful. But hey, at least I've got a charger for both my Zune and my smartphone via the USB port in the front. One of those would be about $20 anyways.
So I was upset, and decided to read reviews for it here on Amazon. OH NO. 3 1/2 stars?! LEMON. But alas, the first review tells me to put it into ISR mode! Lo and behold, it's perfect. Out of all the test songs I played, everything sounded perfect. Except the bass of "SexyBack" was a little distorted, which I had never experienced in my car before.
All in all, this is an awesome product. Even better that I got it for $22!
=D
The best FM Transmitter there is for non ipod players. . 
2008-07-12
I've owned one of these for a little while. I use it with my Zune player. It's the only FM transmitter I've owned that actually works. No static. Radio stations only infiltrate the signal if you're driving right by them.
I had their iPod FM Transmitter, back when I owned an iPod, and it worked just as well. This leads me to believe iTrip make the best FM Transmitters in the business.
There is only one problem with it. It plugs into the headphone jack. Because of this, depending what you're listening to, sounds you know are supposed to be there won't be there. I experience this when listening to Japanese songs especially. I don't know if it has to do with frequencies or what, but when I put the same song on a CD and play it on the car stereo, everything is there.
I wish iTrip would make an FM Transmitter that plugged into the jack on the bottom of the Zune (the way they did for the iPod). I hope now that the Zune has been significantly improved and is gaining in popularity, they'll do this.
Still, if you don't have an iPod this is your best bet for an FM transmitter, period.
Works great for me 2008-07-08
I agree with a previous reviewer who says that these things (regardless which model) will work better in certain cars than in others. The Griffin iTrip works very well in my car ('00 Saturn, Pioneer CD deck, in South Central WI). I made the mistake of not getting a deck with an Aux jack when I purchased a new one in Fall 2005, but I didn't yet have an mp3 player at the time and had no intention of purchasing one.... little did I know!
On the other hand, I had previously on 2 occasions bought one of the Belkin Tunecast models and they were both wretched, and were promptly returned both times. Yet, based on the reviews, they seem to work well for some people.
The price on the Griffin seems to be coming down, so definately give it a try. And you can even charge your mp3 player on the go with your own USB cable!
Great idea, but poor implementation 2008-06-30
I returned this item after 2 days of trying to get it to work. I live an hour away from a major city and I was still picking up interference on every channel. I have a Scosche FM Transmitter that get hardly any interference at all. I liked the design with the available USB plug to be able to power my device instead of having a 2 plug splitter, but the constant interference was horrible. I picked up a $15 no name brand item at K-Mart with the same USB plug and it gets less interference. Devices like this shouldn't get interference from weak end of the dial stations.
