I had the older HP150 and I really liked them for portable use, as they were comfortable and isolated sound incredibly well. But this design has a tendency to break at the piece of plastic that holds the cups, as my pair did 2 weeks after the warranty ran out. It's very expensive to have SoundMAGIC repair them, and absolutely impossible to do it yourself. And it's quite a common issue. sadly that makes me rather hesitant to recommend these headphones.
Great sound and noise reduction, but bad construction.