Yeah, that is a huge plus.
The math is different. I love that - it's giving him a different way to think about things. I know if we did it everyday for the 40 minutes each day, Nate would be done with the 4th grade part. But, since dh left he's only been doing 20 minutes most days (sigh) and only doing it 3 days a week. I'm buckling down, though, and he's going to start doing it 5 days a week for 30 minutes each day. He flew through the 3rd grade part... and the 4th grade part isn't hard for him, he's just not doing it as often or as long. So, I need to up the time again.
It's neat seeing him think in a different way. It's definitely not just 1+2=3.