These work at preventing pregnancy and are comfortable for having some great sex. Spermicides are a bit sticky, creamy and messy. Though that's not exactly a bad thing. So that's about all there is to say.
I love these inserts they are great value for the 12 you get and it allows you to have unprotected sex and not have to worry with no side effects at all. Only downside is you have to wait 10 minutes before being intimate and it take away from the spontaneousness of sex