I'm using the Pre-K with my newly 5-year-old. He's not quite ready for AAR 1 and needs review on his numbers and shapes too. It has been perfect for him.
I used the science and history this year with my 4th and 1st graders. This was my fifth year homeschooling and the first year ever that those subjects got done consistently. I find it very easy to teach, engaging, and my kids have retained a lot! We did History Year 1 and the Space Science, Human Body, Energy, and Arthropods units.
I also just started using the handwriting for my 7-year-old. We love the handwriting book. Simple and a fun little art activity on each page.
I'm actually considering the math for my soon-to-be kindergartener and 2nd grader. I was really impressed by the samples. I've loved CLE but my almost 2nd grader didn't pass the placement test for TGATB Math 2 and now I'm questioning how much she learned/retained.
Looking at samples, I didn't feel the phonics and spelling are as solid/comprehensive as AAR and Apples and Pears so we haven't pursued TGATB LA. But I have really, really enjoyed the other stuff.