I'm a bit on the fence about these. I love the general idea of having "Ability cards". The cards are well designed, art looks nice and the layout works just fine for printing at home.
I find the "reminder of the benefit of the feature" a bit too subtle, just a line of text or two somewhere explaining the very basics of each ability would make the cards more useful.
Still, I'll pass these on to our groups Fighter, and we'll see how the product holds up in actual play.