I originally used a Belkin wireless FM transmitter to play my IPOD/MP3 over the radio....after about a week or two of this I couldn't take it anymore and ran across this option! This works great..not staic no fading, no cords all over! Once installed it is a now brainer!

Breakdown:
Wireless FM Transmitter......$30 to $40 (poor sound quality)
FM Modulator..........$29.99 plus installation (easy to do it yourself with EXCELLENT sound quality)

Don't make the same mistake I did and try the FM transmitter you will be disappointed.

Very rarely will I praise customer service for a company, especially in the modern age of "passing the buck" and offshore people who don't speak the language. Anyways, got this product for my wife, whose older car has no aux in port, but she likes her MP3 player and wanted to play it in her car. Product arrived, I opened the dash per the instructions Crutchfield sent (which are awesome, BTW), and had to call about the 12V wire. The CF rep was extremely helpful, since I'm not radio installation expert. He was able to point out which wires to splice together, and even mentioned an easy way to do it, with Scotchloks.

Beyond that, the product is also great! I have little to no background noise, it stowed away easily under the factory radio, and the sound quality is right at CD level. Great stuff, couldn't be more happy with the money spent!

After buying and returning a few wireless units - including some that were twice the price - I gave in and went the wired route. GREAT MOVE. Easy to install, works great. Do I have the same fidelity of a cassette unit or in dash unit - no. Is it pretty close - Oh Yeah. I can't say enought about how easy it was to install using Crutchfields instructions. If I just had what came with the unit - I'd have pulled my hair out. Using Crutchfield's info sheet I had the radio out - this unit in and the radio installed again in less than an hour.
I should have bought this first.

Like others, my experience with wireless FM modulators had been very disappointing, so I had fairly low expectations for this product, but based on the favorable reviews, I went ahead and ordered it. I'm glad I did! Installation was straightforward, the hardest part being working in the tight spaces behind the radio bay in the dash, and finding a place to put the on/off switch (I unded up removing the unused cigarette lighter, and using the hole which was almost the right size). Once installed, I found no FM bleed-through, nor was there any appreciable hiss or static when the MP3 wasn't playing. There also has been no interference or static noted while driving. There is a loss on the base end that is noticable, by since my factory radio has a modest equilizer, it was easy to correct for that. A simple bass/trebel adjustment would probably also do the trick.

You won't get concert-hall performane with this, but for what it is designed to do, I think it does it very well, especially at the price.

Boyfriend hooked this up to my car with ease, i jumped in and plugged it up to my Zune (mp3 player) and turned up the sound on 88.3 FM and worked perfect. Love it, i use it everyday.

If you don't have an auxillary input on your stereo this is definetly the best way to go. It sounds great. For all you people who said there is static and stuff...all you have to do is play with all the volumes. I have my ipod volume up about half way, the modulator volume up all the way and I adjust my stereo volume as needed. A+A+A+

Overall, this is a great product. In the greater NY area, there is very little "free FM bandwith", so any other wireless FM modulators that I've tried have been a complete waste of money.

Bottom line, this thing works as advertised. The audio quality coming out of my I-Pod is as good as any FM radio station in my area. I'm sure some audiophile will tell me that this doesn't mean much, but when you consider that my '04 Toyota Matrix isn't a concert hall to begin with, it's great as far as I'm concerned. The nicest thing about it (aside from how well the product works) is that rather than a bunch of messy cords running all over the place and/or extra accessories plugged into my cigarette lighter, there are only two visible modifications to the car...the power switch for this unit, and the cable that you plug into the headphone jack of the I-Pod. If you even make a minimum effort, you can easily install the switch to make it look like it's a factory-original part of the car, and can conceal the audio cable so that it "disappears" when not in use.

The only gripe I have is that while the Crutchfield directions were very thorough in regard to how to remove the radio and install the unit, they were fairly vauge about how to identify the correct power cable to tap into to power the unit. As a result, I initially mis-wired the unit and blew a fuse in the car. I suppose if I'd have called customer support, this probably could have been avoided. Bottom line, I'm a fairly handy guy, and I probably spent an hour installing the unit.

I'd recommend this unit to anybody.

I tried using a wireless FM trasmitter for my new MP3 player. That was a BUST! This product (although I did not install it) works wonderfully. I had professionals install it because I didn't have any equipment to do so, and it was just less of a hassel. However, the support from the Crutchfiled website was awesome! I did the internet direct connect and they set up a cart with everything in it that I needed, and all I had to do was pay! Awesome help and easy to use this site!!! I'm extremely happy with the end result.............clear music from my MP3 player in my car!!!!

I bought this unit for my wife's Mitsubishi. She has an Infinity sound system in it, which is extremely crisp. I was skeptical that an antenne-input system would give up on sound quality, since I had purchased a wireless hookup for myself and the sound quality was horrible. To my surprise and joy the sound is just as crisp as listening to a cd. The only slight drawback, and I'm being critical here, is the bass is dimished. Other than that I submit it as an option for Ipod owners who don't want to spend the hundreds of dollars for a factory made Ipod wiring harness. I may start selling it as an option in the car dealer service departrment where I work.

I looked at all my options for installation of an Ipod in my vehicle ('05 Vibe) and this looked like the best. I wanted a clean built in look so I nixed the FM transmitter route. Unit is well built. I didn't like the switch that came with it so I built a custom 3.5mm jack with a microswitch. When I plug into the jack it switches the modulator. The play back is good. Just a tiny bit "buzzy" at high volumes but since it's in a car the road noise masks it. Depending on your application the install could be easy or hard but the wiring is straight forward.