OK, so I just got the ACM installed on my 07 RRS. I'll go through the pros and cons.
Pros:
- Excellent sound quality. Compared to the option of connecting your iPod in the AUX jack, the sound is 100x better with the ACM.
- Conveniently places your iPod in the glove box. No wires going around the cabin. It also gives you the option of a USB port connection.
- Charges your iPod like most other iPod interface modules.
- You can change songs and playlists from your steering wheel.
Cons:
- You cannot see what songs or playlists are coming up. It's a connectivity module, not an interface module. It's really a fancy, convenient connection device.
- Feeding of the last point, you can only see a list of playlists on the iPod itself. You cannot see anything on the main radio unit or the nav screen.
- When receiving a Bluetooth call or changing to Sat. or terrestrial radio, the iPod continues to play. You must manually pause or turn off your iPod to stop it.
- Can be quite pricey for a connectivity module.
Overall, once you get used to it, the better sound quality, convenience and charging capabilities make it worth it if you can afford to spend anywhere from $500 - $750 for that convenience. It's up to you; for me, I'm glad I did it, but I wish it was like the module in my Audi that is a true interface module. I guess, the best way to put it is that it's worth it although it's a bit annoying and some people will never get used to the quirks of using it and that's understandable.
Hope this helps...