Not sure if it is anymore but if you want to read the original Quantum & Woody #1 for free it was up on Comixology a few months ago. I'd search for it and see if it's still up for free. I know they had the rest of the series, too, not sure how much (probably .99 or 1.99 an issue).
I'm excited about the new Quantum and Woody. Valiant just keeps getting better and better each month--Archer & Armstrong #7 for instance was absolutely amazing.
EDIT: Yeah, it's still free. http://www.comixology.com/Quantum-an...omic/ICO004413