I did... I wasn't blown away by AppRadio and probably won't use it too much in the future. That certainly isn't a deal breaker for me though, especially with Apple CarPlay coming this summer to take its place (I have an iPhone). Here are my issues with AppRadio...
1) With iPhone, you have to use both a USB/Lightning cable AND an HDMI cable plugged into Apple's Digital Lightning AV Adapter... It is a pretty clumsy setup. Also, you can't use the 8000NEX's iPod mode using this connection... It has to be plugged in by USB only! I'm not familiar with how Android works. For iPhone, I'll gladly give up AppRadio to have a fully functional iPod mode. The standard iPod mode is very intuitive and beautiful. Scrolling through music is just as fast as doing it on my phone's screen.
2) It is a totally separate experience from the rest of the 8000NEX. It is basically an app that overlays all the awesome features that the 8000NEX comes with. The actual AppRadio software is run by your phone, not the head unit. The head unit just interfaces with it.
3) AppRadio IS buggy and temperamental. Sometimes apps start, sometimes they don't.
4) There aren't many apps! The only one I would consider using is the Escort Live app with my Passport Max radar detector... But it honestly isn't worth the hassle. Pandora is built in to the 8000NEX and works great, so there is no reason for having it separately in AppRadio.
At the end of the day, the 8000NEX has all the sources I care about built right in WITHOUT messing with AppRadio. I have Pandora, iPod mode, SiriusXM, BT, etc. accessible right from the home screen, and they all work wonderfully. The 8000NEX's native OS is so much better than AppRadio that I don't miss it, AT ALL. Plus, CarPlay is coming soon, and it will take the place of AppRadio on the home screen for iPhone users.