Which accessory will work best?

I posted on here less than a month ago asking about the 30-pin to lightning adapter for the iPhone 5, seeing if it would work with my '08 Volkswagen Jettas iPod Adapter. Sadly to say, I should have listened to my gut feeling (but I appreciate the effort in trying to help) that it didn't work. I was looking around on the Google machine here, and found through a forum these things from CableJive. THey didn't say if they worked or not and I was wondering if anybody had any ideas if they do or not? Or if they think it would work?

http://www.cablejive.com/products/dockBoss.html

http://www.cablejive.com/products/dockBoss-air.html

http://www.cablejive.com/products/dockBossplus-for-iPhone-5.html

Anyone have any tries with these things at all? THink it would work (although it does say it)? Just want to be sure this time. If you do, which would be the best buy?

Thanks Community!

Kyle