I wonder what the success rate (or failure rate, depending on how you want to look at it) is for marriages of couples with children from previous marriages?
Don't really care about statistics personally, fro example flying is the safest way to travel, but if you crash I doubt you will agree. At any rate, I should think it's lower since they take more caution than unattached people.
I don't think it depends on the kids. I think I'd pay more attention to the fact that if they got divorced once already it means they will do it with much more ease the second time around.
I think it has more to do with the person you pick for a mate than whether or not you have kids. I do realize that having kids and having to deal with an ex can put a strain on a new marriage though.