I have used almost every DAT test software there is including Kaplan, Top Score, etc and I think that the KSF is much worse than anything else. I was very disappointed when I used the software and found that the questions are barely like the actual DAT. On the QR for instance, there wasn't a single trig problem and they would ask 2-3 of the exact same question in a row but with numbers switched around.
For instance they would ask you to multiply together five different fractions and on the following question they would ask you to multiply together another 5 fractions. In one instance, four out of the five fractions on the second question were the same as the one before it!!! I seriously could not believe it. Anyone who has posted a testimonial on their site saying that it is great or worthwhile is lying. Don't make the same mistake I did, KSF stuff is nothing but a waste of your time and money that is better spent on other materials.