I dont buy it honestly. Maybe compared to Beats By Dre perhaps, I dunno what he's expecting. He "doesn't like them" because they dont boost bass like beats do (i.e. artificial sound enhancement).
this review says it best honestly :
http://www.pcmag.com/article2/0,2817,2412622,00.asp
"When there's no deep bass to deliver—say, on a singer-songwriter style tune by Bill Callahan—the track doesn't sound weirdly overloaded with extra low frequency content. This is important: The HDJ-1500 is a great tool that maintains a strong clarity throughout the entire frequency range, without neglecting the booming lows that are often associated with DJ and dance tracks, and without adding them when they're not there."
edit: I really don't know what to say to those guys. If you're looking for artificially inflated headphones that dramatize excessive bass while sacrificing the rest of the sound range, then sure go nuts lol. These things literally rattle my head on bass heavy tracks.