Griffin TuneFlex with Remote
 

So my Z does not have an USB to plug my ipod into, and I really want to be able to change songs with the aux port. I searched around and decided to buy the Amazon.com: Griffin TuneFlex AUX Mount and Charger with SmartClick Remote for iPod and iPhone (Black): MP3 Players & Accessories Griffin Tuneflex with a remote. It let's me leave the ipod plugged in (charging) in the power port and change songs with a remote (strapped onto the steering wheel).

Does anyone else have this? Did it work well? I was also wondering if it is safe to leave this plugged into the power port for long term? It shouldn't drain battery when the car is off right?