I wouldn't be too harsh on Walgreen's diapers. As a casual diaper-wearer, I find them more than adequate, and they absorb plenty. Don't flood them of course, but if you're looking for a diaper which won't break the bank and is halfway decent, Walgreens aren't that bad. Now Assurance, that's a different story: no matter how I wet them they still feel like I peed in a garbage bag and hung it around my legs. It's okay when it's warm(though its a bit gross-feeling), but then it turns cold and ruins the whole experience. Walgreens brand holds in warmth a bit longer and doesn't feel like a cold turd on my legs like Assurance does, thanks to it's cloth-like exterior.
BTW, Assurance's pullups feel like granny-panties, and they don't absorb worth a rat's tail.