I am dissatisfied with Appradio. It has fallen flat IMO. However, my AVH-4000-NEX is a gem.
Did I buy it for carplay? Yes.
Has it exceeded many expectations? Yes.
Does it stand up on its own without issue? Yes
Is it perfect? No.
The good.
1. The best iPod interface you can have short of carplay. Maybe still better in some ways. The built in iPod app picks up right where I left off. It works over a simple USB connection like it always should. If I click on the artist while it's playing a song it takes me to all songs he's playing. If I click his album I come to all albums by him. Click the genre you get the picture. The interface remembers what the last thing I was doing after I pick a song, so if I miss with my fingers I don't have to start over. The metadata works well and the album art is great. Only wish it could access my iTunes Radio. Brings me to 2.
2. Nearly perfect Bluetooth Audio. It accesses my iTunes Radio stations so I can change stations without touching my phone. This is amazing. The only thing holding me over till carplay is this. I love this feature. It remembers what I was doing just like USB iPod control, however sadly it does not do the cool iPod artist matching quick search I listed above. Oh well. Maybe in the future.
3. Really great settings system. The setting are in every Main window. The settings are easy to understand where what setting would be hidden and the device gives me good control of my unit. I do hate that some settings are locked out unless m parked, but my bypass comes this Thursday, so it's soon a non issue.
4. Great parrot powered microphone that has fantastic audio quality. Fully supports Siri eyes free (or google now possibly. Don't have an android phone to test with). Nuff said. The quality is clear enough that a computer understands me while I'm driving in a miata. I'm pretty happy about that.
The bad. It's a short list.
Why is every Audio option on this radio segregated? If I listen to my iPhone over USB, Bluetooth locks out. If I use Appradio mode, usb iPod locks out. It has two USB ports but I can only plug in one thing at a time. What the hell?
That's it. Hopefully that is fixed in a future software update, and honestly it isn't even that bad of a problem.