Well, you saw it on the Internet so it must be true. Do these people guarantee their forms?
In court, all one party has to say is that they didn't understand what they were signing.
Notarizing a document just confirms the identity of who signed. One of the parties might not have even spoken English (or French).
Getting independent legal advice dosn't mean a lot of expense. You could use your Internet form. Then each party could go to a lawyer and get it signed off. It shouldn't take more than half an hour.
FN