Having initially rated this as 3 stars due to my not being able print it, I can now say I've Realised my mistake and give it the 5 stars it deserves.
To print the pdf file with the fronts and backs aligned, I selected duplex printing and "auto-rotate and centre" in the options given by the pdf print program. This worked absolutely flawlessly.
The content of the cards is accurate without being as verbose as many of the descriptions in the PHB. They are a real pleasure to use in-game and as an aid while preparing for the game.
[5 of 5 Stars!]