What are my chances of getting into Montclair State University or William Paterson University?

According to Naviance, my GPA is a 2.75 but when I calculated it myself I got 3.15. I scored a 1680 on my SAT: 550 in Math, 550 in Critical Reading and 580 in Writing. I was told that Early Decision would increase my chances of getting in, so which school would I have a better shot at if I apply ED and I have a really good essay (I was told I do) and teacher recommendations? I was also told that early action would lower my chances of getting in…is that true? If I’m going to follow through with ED, I need to know for a fact that I could get into whichever school it is that I’m applying early for. How are my chances looking for the two schools?

In at WPU and a maybe at Montclair. If your GPA really is a 3.15 then your in at Montclair

If your GPA is 3.1, you should get into Montclair. Your scores & GPA are a little below average, although they claim to be “holistic” now.
I’m assuming your in-state, so you’ll probably be fine for both.