Yes, I've used it several times, so easy! I'm not a couponer but the app makes it so easy and there's such a variety of stuff on there, and all they do is scan the barcode at checkout, totally worth saving a few dollars!
I have tried the Cartwheel App and it is my favorite app. I love saving any kind of money, even if it means saving $.50. It's so easy and it will tell you when it expires and everything. It's easy for the cashiers too because all they have to do is scan one barcode and the savings are automatically applied. It is definitely worth it, especially if you are a college student. I got most of my dorm things on sale.