I think it depends on location too. I don't have an Aldi's or Costco, and Sam's or BJ Wholesale is over an hour away. The biggest bargain place we have is
Walmart, and I do save alot there, but combine with coupons also.
So for supermarket savings around here it really makes sense to coupon.
I save at least $10 week at least with coupons/sale combos, so that is $520 in my pocket each year for doing almost nothing. That isn't even using any extreme methods..just checking a circular and checking my coupon box.
DD19 is only home about 1/3 the time now, so my grocery, pet & household goods budget is only about $125/month anymore. In the summer even less because I can get my fruit/veggie at the local stands.