I bought my HTC Desire 728 almost one year ago with 16 GB internal storage & 2 GB RAM & 4G feature The performance we can’t say awesome but overall it’s running quite well.
Battery back up is good(It’s depends on usage)
Sound quality is Average you can not compare with Sony but it is at par with Samsung
Primary Camera(13 MP is primary and 5 MP is secondary) performance is awesome but you have to be very carefull while clicking pics. If you hold for few second it will work better
Design is slim and attractive