We've been using Time4Learning since November for our 7th grade son. I've been really happy with it so far. He's taking Language Arts, Math, Science and Social Studies. We backed him up to 6th grade math and it seems to be pretty thorough with a lot of reinforcement. Science is only offered through 6th grade so we're using that right now. I've just subscribed through homeschoolbuyersco-op.org for their group buy of CyberEd Plato for Life, Physical, and Earth Science. It looks like between T4L and CyberEd we should be able to complete a middle school curriculum for my son. If we continue to homeschool after 8th grade, we're going to have to find something else for high school.
Depending on the age of your child, I think T4L is a great program. It supposed to be pretty comprehensive after 2nd grade, maybe not so much before that. I think some families use it to supplement and some use it as a complete curriculum. They also offer a 2 week trial period to try it out. I've also really enjoyed the parent forum. Lots of advice from other families, plus the support staff is very prompt and helpful with questions. Good luck.
Cindy McCormick ckm@otsc.tamu.edu