Open relationships?

This is random but lately I have been hearing a lot about open marriages. Theoretically I don't see anything wrong with it but I can see how it could be potentially destructive in reality. My husband and I have discussed it vaguely but are skeptical if it would work for us (we have a great relationship and I've never been with anyone else). It's just something I'd like to learn more about and keep my mind open to because I don't necessarily agree with the philosophy of monogamy nor do I want my decisions to be built on fear. So my question is, has anyone here ever had a serious relationship that was open or know of someone that has? How did it work out? What's your opinion on open relationships?

Every individual couple is different so it can't be said whether it's a good idea or not; all you can really do is discuss it a lot and make sure everyone is comfortable and make sure you maintain healthy communication; it's still a risk IMO because it's definitely caused problems in past relationships in my experience.