Apple music lacks a lot of stuff for me. And then I need constant internet, which is a bad idea when there is no coverage or roaming. That's why I got a 256GB model, and it was easy to sync over all the stuff from my ipod classic to the iphone mini. I was just surprised that it didn't go quicker, despite going from a miniscule HDD to a flash storage.
For single files, I just synchronize via google drive (had my own owncloud installation before on a mac mini g4, but I didn't want to put more effort into something I'll get for free elsewhere).
I dislike charging over wireless. It wastes so much energy (which is a problem with a battery pack or if the phone has a high load, it tends to overheat). And when I hike or drive, it's easy for the phone to move around and loose connection.
On the plus side, the connectors are less prone to wear out.