I picked six items I would regularly buy at Walmart, and I compared their prices with Alice.com:
Granted, Alice gave me 4 coupons, which saved me $3.35 (which means I can't get this same deal every day). But Walmart also had several sales--so their prices will fluctuate too.
CONCLUSION: In this study, Alice.com was cheaper. And you can't argue with cheaper. Alice.com also saves you time (you set its schedule, and the items show up on your doorstep). And did I mention that there's no shipping costs, ever? So, yes, Alice.com is a good deal.
If you want to streamline your life and save money and time, you should give Alice.com a try.