I have owned two pair of the Apex HP30’s for over five years. They are in constant use. There have been times when I left the headphone monitor way up (where I could even hear the headphones from the control room- in the mic booth late at night) and have never damaged these things. The only downside is they're a bit 'bright' compared to the monitors. However, it gives one an accurate appraisal of the mix- if you compare to the monitors.
These headphones are great for live sound. Of course, in FOH or Monitor World, you're not usually mixing with cans, so it's not expected that these will do for studio mixing - that's why there are such things as studio monitors. my ear pads are starting to peel - big deal, I'll just buy some new pads. I primarily use them for line checks or level-setting at mix position. I have driven them as hot as I could get and they never clipped! I can't comment on the exaggerations others talk about (high-end versus low-end). Leave the studio monitoring to the gear that's meant for that task and let these cans handle the rest.
These were my FOH headphones and I always relied on them because they were always accurate. As well, I'm not what one would call delicate with things, so the fact that these headphones could take a beating is a great plus in my book. The fake leather starts to wear off, but they are still very comfortable and they give you a guide on how to replace the materials when that time comes.
The bass response is excellent, however not at all overwhelming, and the high end is crystal clear. While listening to my favorite recordings I have noticed slight nuances I never knew existed in the song... totally amazing. I highly recommend these headphone, and I definitely plan on purchasing more of them in the future.