I have not had any trouble putting MP3s on the iPhone 5. I haven't had it long and really have not payed a lot of attention to how it works, it may all go through itunes but I don't buy anything there. I buy from Amazon, I download two free live shows each week from Wolfgang's Vault, and I burn CDs. All go to different folders in "My Music" as MP3s. I send them to my iPhone, maybe I use itunes... will pay more attention next time I add an album to the phone... but so far it has been quick and easy.
IIRC, I drag/drop files to itunes, then add them to device>iphone.. no problem.
I did notice the other day that my iphone was getting hot in my pocket after maybe 30 minutes of play through ear buds while working. The guy at the AT&T store said it should not be getting hot and maybe I should take to the Apple store... of course not the closest one.
It is my first smart phone... well, besides a Blackberry Pearl which wasn't much smarter than a pocket calculator. Next time I will probably go with the current Galaxy or HTC but this was easy so I did it and so far so good but I may end up paying for more Dropbox...
My daughter bought an used iMac laptop about 1.5 years ago. It died about 6 mo ago. She loved it until it died and to fix it was more than buying a good laptop with W8, She got a Lenovo and it happy with it.
@Jim Roseberry... what do you think about the new *ahem... Pro Tools 11 ?? It is cool man... (runs away).
Julien