Have had these since 2012. Can only agree with previous speakers - it will (in the price range) not be better than this. Has been handled very hard periodically, which has resulted in me now, after all these years, had to replace the cord (about 300 SEK for the original cord). Otherwise no worries whatsoever. Have slept with them, had them in the rain and debris, on the beach, running rounds, to video games .. Crystal clear sound in from both phone and laptop in all modes. Unfortunately not had the opportunity to test them in amplifiers.
Remember that at first they could feel like they were sitting on their ears after a couple of hours. Depending on the size of the head. This facilitates the more they are used.