I bought the Yuin Pk3's the last time they were on Massdrop and the quality is outstanding. I can only imagine these will be even better. However, as a word of warning to people with larger ear openings, the shape of the Yuins (assuming the exterior components are all the same shape) means they're prone to falling out, even with the included foam covers. So, if you have larger ear openings, I'd suggest going for an IEM with a larger cover piece that will fit your ear opening better.