I used level 1 for my struggling in math child. Not with anything else. We’ve gone through/cried through an exhaustive list of math curricula He did pretty well with it. We enjoyed it. But I didn’t have the books. Just the cd-rom. So that played a part in why we stopped using it.
With the cd-rom I needed to sit at the computer with the child. We don’t have a laptop & so the little ones would be ‘taking care’ of the rest of the house while we were in dh’s home office. ;-/