I owned the XB700s. They're very, very, very bassy and I would only use them with popular rap music or popular EDM. The detail is lacking significantly.
They're not really meant for serious audiophiles. They're meant for your average Joe who listens to pop music and wants a nice Beats-esque headphone.
If you're a serious audiophile or you listen to detailed, intricate music, then the XB700 isn't really useful to you.