First of all, the sound quality. All I want to say about this is - Amazing. The walkman headset sounds really good, and the phone has dual stereo speakers in the back on either sides of the battery and that too, sounds very nice. The walkman player looks cool with album art and visualizations. Its has an equalizer with presets ( can be cuztomized in manual mode ).
Camera- 2mp cam with decent camera clarity. One feature the cam couldve had is zoom whichs not possible in 2, 1.3 mp. Although it is available in vga mode. Video recording is good.
Motion gaming- the phone has motion gaming support but there r no pre-installed motion games. Although there is one game which makes occassional use of the feature.
Battery- not so good. Lasts upto 1.5 days max, or so has it been for me.
Memory - 14 mb built in, expandable upto 4 gigs with m2.
Firmware, software, UI - The user interface is pretty good going by user friendliness but its not very stable. Themes are not supported but there are a few nice themes built in. Java apps are supported.
Overall this is a great phone. There are a few cons which are shadowed by the pros. Im ejoying using it and I recommend this phone , especially to music buffs..Cheers.