I like that they give you 15 free lessons to try out. That should give you enough time to see if it's right for tour family. My 17 and 10 yr old enjoy it.
Teaching Textbooks is very good especially if you struggle in math. There is talking by the program for a minute or two and then it forces you to interact. This is good if the student has a short attention span. The content is thorough and the practice session includes problems from other previous lessons. This way you don’t forget it like you would if you only did the current lesson’s related problems. It works great for my child in 5th grade math. Be sure to take the placement tests to figure out which program you need as states vary in what they teach in any given grade.