I use for 2 years and apart from the weight sometimes I have not encountered any trouble.
I use them with an amp but not necessarily top has the advantage of being strong.
Their sound is right for me, what some consider "loud" and although I converted with an invention of modern times: the equalization.
"Shaken" live high, no aftereffects.
As against this are real masses. Attention.
On occasion I think between that and the nine "other brand" should not hesitate.
More credibility provided "as customers" due to the small details ...
The little extra: in times of feast of music you can cover your neighbor.
Summary: great for the fans.