We had Seton from 1992-2003 and I was happy with it. I was with Our Lady of the Rosary for a while, and for the young group, it was very good. Seton had their own Science books and they did a great job. Catholicism in all curriculum. If a student can read, they can follow instructions and do their work w/o parent. Program is set up for part time working parent. Their curriculum goes into college as well.
Math in last year high school needed a tutor. It was the math we do not use with negatives, positives, in () and such. Other than that, I was pleased. We went year round, which is important to not feel rushed. You do it at your pace.