The only reason I didn't give a 5 star is because in the "review" it said I had an error, but it was very vague and I had a difficult time finding it. The error was a checkbox that got missed, but it seems it should have highlighted it or at least told me the checkbox description.
The Federal section was very clear and easy to use. I deducted one star because the Maine State section was confusing and not easy to use, particularly the part-year resident pages.