The Beats Tour casing is made of metal. They sound pretty darn good actually, at least for a pair of $150 earphones. The sound isn't recessed and there is noticeable bass to these but not at all overwhelming or thunderous like the Atrios. These are also not earphones that are analytical like a pair or Ety's so if you're looking for that, look elsewhere. Comparing them to the EX700s I use to own, the EX700 wins by bringing more details up front but there's also about $100 price difference between the EX700s and the Beat Tours. Quality is pretty good but these are mass produced in probably big batches, my friend's pair was DOA and he had to exchange them two days later, but then again, he pretty much picked up a pair the same week they were released so it could be a problem with the initial batches, QA as with any product gets better later on so I would come to think that there shouldn't be any QA issues at this point since they have been out for a little while now. If you need musical in-ears, these are a very good choice for the sub $200 market. These also edge out most armature based earphones on the market as well. A fuller and wider soundstage without the veil (a lot of armature based earphones makes that sacrifice, to add warmth it introduces veiling or else the sacrifice the low end in preference to gaining clarity).