with the 147 bt, tuning on the phone is pretty simple and easy, very user friendly clean looking head unit with nice sound really diggin it after playing around with it on multiple occasions in car audio shops and big electronic stores, even downloaded the tune it app on my phone for fun testing. After getting a clarion cz702 for my buddy, i dont really like the amp guard feature it has nor its usb music menu usuablity. Sure it has good audiophile options buuut the interface for every day use is unbearable (in my own opinion) compared to my 80 prs and the alpine 147bt interface is a lot simpler then my 80 prs.