I don't like Separation Agreements. Many would surely disagree. In my view, Separation Agreements are not always that easy to enforce. It is much better to have a court order, especially if you seek to enforce a parenting plan. While the provincial government has a government agency mandated to enforce support orders, no similar agency exists with respect to enforcing parenting provisions. So, I don't like Separation Agreements.
Gene C. Colman Note, 17 February 2020: You have found your way to this page on my blog presumably because you are interested in whether or not you can make a legally enforceable Separation Agreement with a mentally ill spouse. Below you can read one of my first blog posts dated 8 July 2012. I thought that it might be time to update that blog post's information.