Should you live together first?

I know quite a few couples who decided that living together was the next logical step for them. I believe it will lead to marriage for some of them. I think it could be the beginning of the end for at least two of them. How do you know if living together is the right move for your relationship?

The times I’ve seen living together lead to marriage, it was usually because they were certain about one another already. When couples try out living together to see if they can “handle” living with someone, they usually find out they can’t do it.

Do you think living together is the best relationship test? Have you ever lived with a girlfriend or boyfriend?