The hardware control buttons for the music player indicate that Orange expects you to use Berlin to listen to tunes. Plentiful memory is important in this scenario so it is good that there is 80MB built in and a MicroSD card slot for adding more. But Orange has really shot itself in the foot by positioning the card slot underneath the SIM card so that in order to swap MicroSD cards you have to remove the SIM, and in order to do that you need to power down.
The provided in-ear buds are reasonably good, but if you don't like them you can use your own instead as Orange provides a two-piece headset with a 3.5mm connector just above the microphone.
Unfortunately the connector to the phone itself is mini USB and it shares the mains power socket, so you can't charge the phone and use the headset at the same time. The socket is awkwardly located on the right edge of the casing - I always prefer headphone sockets to be on the top or bottom of a mobile as these locations make it more comfortable to tote the handset in a pocket with headset connected.
It's worth noting that you need to attach the phone end of the headset if you want to listen to the FM radio as it houses the antenna.
The mini USB socket is also used to connect Berlin to your PC. You can access on-board memory and the MicroSD card in mass storage mode or use the provided software for synchronising - including synchronising Berlin's calendar with Outlook on your PC.
Battery life proved to be very good. Off a full charge I got ten and a half hours of continuous music played from a MicroSD card. With no battery killing Wi-Fi or video calling option in this phone I'd expect it to last me a couple of days between charges.