I can see pro's and con's to having a joint bank account. Really it comes down to do you trust the person youre with to be completly honest with you about money spent? And how do they view their own money? Do they truly live by the creed of "our money" or something darn close to it.
Ive done the joint account with an ex. That did not go so well considering the lying cheating bastard stole from it. Though then again I should have known better anyways as he always considered his money his. As well as mine his.
For the guy Im with now. We didnt make it to a joint account per say. But I have access to all of his accounts. (business and personal) I handle the bills out of it, do the deposits, I have been out of work for awhile now so usually I am unable to contribute much to rent and such (though that should change shortly). Though I do handle all the food. And when I did get money in I always spent it on the little odds and ends we needed. Where yes sometimes he would over spend, or even I would. We both just buckled down to deal with it, learned a lesson and moved on. I am lucky with him, he jokes sometimes and says "whats mine is yours and whats yours is yours" (when it came to money) because he knows I have so little, he even takes it a step further and has always told me take what I need (though because of the tight situation I never buy anything unless i can scrape together the money and its an urgent need) Which he sees and appreciates. He was screwed over by his ex who stole from his account, told him she was paying the bills and never did (she kept the money) So to him, I know it was a huge show of trust when he let me access his accounts
I think a joint account can work if you are honest with eachother and on the same page, for the most part. I think its good if you have a joint account but also still keep a seperate one too.