I'd say the build quality is pretty solid, and would only recommend being careful with the ear strains as they are molded rubber. If you get a hard case for when they are not in use (or even the soft case provided with them) they will likely last a long time. I tend to baby all of my headphones, and everything for that matter, but I wouldn't say they are cheap feeling by any means. In terms of comfort, I found the Comply P-100 tips to be a perfect pairing, with the stock creme foams second. The dual flange silicone tips take some getting used to if you are not experienced with deep insertion tips, but IMO provide the best overall sound. The housing also doesn't come in contact with your ears, so once you've got a comfortable fit they disappear. They have pretty great isolation - I use them on the DC Metro (which if you know it can get very loud) and I can't hear any external noise, even at low volume. With the 50% discount code still available, these are easily the best value I've gotten so far in my new and growing IEM collection - don't pass it up!
