We'd use something like Spotify, but every month that cost money. My parents like CDs. The 2009 they currently have had the JBL CD changer, but it won't read the CDs.
I have one in my 08. It works great. I plan on updating the stereo this fall. I will keep you in mind for sure because once I pull it out I won't need it.
@Tideland Prius I believe this is a scam. I saw something similar to it on a WTB thread today. I reported it but wanted to make sure you are aware.