I've been using these for quite many years. Maybe it's due to what I'm getting used to, but I find it hard to replace these with anything else when playing bass with a pick, at least when playing anything fast. 1,5mm is just enough thickness so that the pick doesn't give in when contacting the string. Although the material is pretty slick plastic, the center groove with its etchings give my thumb a perfect traction and grip. The 2,0mm version is also good, not just that perfect for me, and the 3mmm version is too much. To each their own. Anyway, give these a shot if you're looking after a sturdy pick that slides right through the strings with minimal snag.