I bought a pair of RHA IEMs. They failed within a few weeks of purchase. I contacted RHA and the customer service was excellent and a new pair was despatched by return of post along with a pre-paid mailer for returning the originals. The new pair then failed within a few days in exactly the same way (left side driver or cable quit). RHA Sound Quality: 4* RHA Customer Service: 5* RHA IEM design/materials/build quality: 1* Imo far too few reviewers have anything even slightly useful to say on the subject of durability or build quality as most reviews are of products trialled over a few days and anyway many reviews are just marketing bs in dress. Very badly made and designed products with high failure rates regularly get praised for their sound quality or low price. Buyer beware, especially if return shipping cost makes warranty claim essentially pointless. Real world reviews by real customers on sites like amazon and people relating their experiences on forums like this suggest an extraordinarily high failure rate for RHA. It doesn't matter how nice the sound is or which pro reviewers recommend a product if the thing is poorly made or has design defects which lead to failure. I will never spend another penny on RHA, UE/Logitech or Sony headphones or IEMs because it is either money or time wasted, or both. It would be great if pro reviewers and bloggers actually regularly used products like normal people do and then updated their reviews and ratings accordingly. First impressions and day one measurements have some value but most us buy stuff to use for months, years, or even decades (I have had Sennheiser and iRiver portable audio products achieve a decade of regular use).