a lot of couple these days are happy with this kind of set up, it's a a decision for both parties.. if they do decide that they are ready for such a commitment.. the only thing is IF it doesn't work, then both parties will suffer much because it's an emotional investment diba? If you look deeper into it, based on our society's norms alkanse gyd ang babae..although, its a decision that both parties made. So, i go for getting married first and then live-in.. i think it's more exciting

just my two cents!