Mine works fine. A couple things though.
The y adapter should come with it, you can use half for a changer, or another remote. Don't know that I'd put that big thing on my transom though, maybe a non-LCD for back there. Other things, when playing MP3's it won't give you the correct track, and the letteriing is pretty much worn off the attenuate button. All trivial things and I like knowing the status of the stereo (volume, ATT, radio station, etc)