We switched to washable pee pads about a month ago, and I love them. Besides being a money-saver, they are better for the environment. I purchased mine here:
Pup Underpads. They are affordable, super-absorbent, hide messes, and do not leak. I just pick up the solid waste and toss it each time the girls go, and then switch out the pad every other day. I did pick up a urine cleaning solution just to ease my mind, and I like to set the pads out to dry on our porch when I can to keep them as fresh as possible.