I've owned a Nokia N-Gage for several months. It's alright as a phone except for the fact that it was built to be used like talking into a taco. But you can simply use the loudspeaker. I wouldn't recomend the headphones that cam with it because the piece that you talk into is so far from your mouth.
it's radio is good but the mp3 player could use work. you cant rewind nor fastfoward. plus, the volume isn't loud enough (or prehaps its because i like my music loud).
I have the game Ashen and it's actually enjoyable if you play it in short bursts. N-gage's games arent meant for continuous play, this is what a platform is for such as xbox.
the battery sucks. it's the worst feature. if you listen to the radio and/or the music player a lot, you battery will be gone in a matter of hours. for example, I listen to the radio on my way to school on the bus but when i get to the subway, i use the music player. the whole trip take's about 45 minutes. then i repeate the process afterschool which totals 90 minutes, or 1hr 30min. by the time i get home, i have only three or two bars left so this leaves little time for actually talking.
beyond these features, the rest of the phone is good.