It definitely helped me because my school is pretty harsh with assigning point values for letter grades. As people have said above, it depends on +/- numbers and how your school assigns points.
AASDAS destroyed mine :/ had a bad start first year of college. Had to repeat a few classes. I would be golden if repeated classes weren't counted. Luckily I never had to repeat a science course so I'm still confident I have a fighting a chance.