My experience is after about 2 years of wearing my alpine custom molded earplugs:
I decided to go for the custom molded earplugs in order to improve my listening experience, in comparison to the more standard earplugs I was wearing. I must say I am disappointed by the sound quality, as the frequency response is not flat, higher mids suffer a much bigger attenuation than the rest of the frequencies. The only upside is a better comfort, but 160€ for this is a bit overpriced..
Also, it took forever to get my earplugs molded - to then realize they were wrongly molded. So I had to go for a measurement session again, and wait again a couple of months to get them - in total I waited roughly 3-4 months after placing my order to get my earplugs.