I hope people aren't expecting like, custom IEM level insertion and isolation and comfort from these. They're similar to foam tips, just different. It's a bit of a pain to get them proper, but once you do they're fine. I bought two of the two packs last time which is more than enough for me, I wouldn't necessarily buy them again but they definitely were more than good enough for my use, especially considering the price. If you're looking for high quality custom molds, you're looking in the wrong place.