Scallops are ridiculously overpriced, considering they are (I have heard on good authority) made from scraps from clothing items made by the same company. But that’s the only negative I can come up with, having used them for several years (and FYI I’ve used nothing but SBD strings for those same several years) and never had to replace the first pair. They may or may not work as well as larger and more complex silencers so far as silencing … but they work well enough for elk and Coues deer and turkey, and they don’t care about getting soaked with rain. They are also small and tight enough that you really have to work at it to get them to attract stickers, and it’s clear by now that the set I have will long outlast me. But they still cost too much IMO. It’s the world we live in.