How accurate is Kaplan ACT review?

I have the 2015 edition. I take the June ACT this Saturday. My scores with Kaplan so far vary but are about:
English: 27
Math: 30
Science: 26
Reading: 25

What should I expect on the actual ACT?
I know I can easily increase my math and English with some quick review. (I was a little rusty on some rules and formulas).
Also, how can I improve my reading score?? I struggle with timing so much!!

I find kaplan easier than the real test. But I dont know. Good luck!

What did you end up getting? I’m using Kaplan to practice and I’d like to know if it’s a good indicator in terms of score(s).