In this thread much has been made about companies using lower priced components, equipment and so forth and it automatically resulting in the said product being over-rated. I think this is a potentially flawed way to look at things, if the product was already priced to reflect the use of less expensive components in the first place. I think a bigger issue is this notion that expensive parts have to always be used to provide the best sound quality. I think an ideal is finding the best balance of price/performance, and perhaps a number of the Chinese manufacturers are doing that. I've heard/read many many good things about Little Dot and Darkvoice products, from people who own other often far more expensive similar equipment. That, if anything, shows you they are not necessarily overrated.
Ultimately, if you can provide a similar sound quality, solid durability, build and power, for a more affordable price, you should be commended not criticised. Honestly, it's not always about the expense of the internal components, materials and so forth. Sometimes it's honestly just a good idea to simply trust your ears.
I mean, beside me I have a modded T50RP that in many ways out perform other much higher priced headphones, I have a cheap JDS cMoy that again, in certain ways, outperforms other much higher priced portables, then I have a higher priced hybrid tube portable amp that someone in this thread has falsely implied is a tube buffer on a $30 T amp, that out performs (power wise) and sounds better than every other portable amp I've used or tested. So as you can see, it's honestly a better idea to sometimes pay less heed to the logistics of it all and just go with what you hear.