I only own two IEMs, the 7hz timeless and these IE300's, so I can't say I'm an expert or anything, but I am very satisfied with my purchase. Are they worth $300? Probably not, for for $160 used off Amazon they're an absolute steal. Fans of edm and other bass-heavy music will love these. Only real flaws are the stock cables being absolute crap, and the mmcx connectors are recessed so you will have to sand/cut the plastic rings off if you want to go aftermarket. Some reviews are complaining about poor QC, so we'll just have to wait and see how my unit fares.