well,
i have been using this phone for 2 weeks now,n i love it.
well Music is better when comparing to other android phones from se and Samsung.im using the ordinary headphone that came along with the package.buts its pretty good.
i got 1 day 16 hour 35 min battery backup(in power saver mode) with mild use of wifi,bluetooth camera n all and a lot of music.
love the video recording,got high resolution.pictures taken also are of good quality.but lack sharpness some times.
its small compared to ace,so its quite handy.never had the lag problem what so ever.front camera are also good,did some gtalk video chat.
i bought the black n green one,n it kinda look cool.
my other choice was Samsung galaxy ace,but this one was worth the buy for sure