Well since you said that you also wanted reviews for levels 7/6 & above, I'll tell you our experience. We've used Saxon most of our HS journey. My daughter is currently working through ALG 1. I'm not a big fan of the DIVE cd's. We used them, but there always seemed to be a problem she didn't understand and when I'd pull out the solution manual, I couldn't understand it either. So IMO, the Dive cd's are just okay. Usable but not optimal.
For a brief time, I considered TT and even had my dd look it over. She spent a few minutes looking it over and told me that she did NOT want to switch. She didn't like the way TT was laid out.
Now...fastforward to ALG 1. We are using the Saxon Teacher CD's (CBD carries) and these are WONDERFUL!!!!! It is like having your very own private tutor and worth every single penny. I don't know if Saxon plans on going back into 7/6 and Alg 1/2 and making CD's for these, but I am sure hoping they do for my next three students.