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i am VERY VERY happy with YOU NOTE. it does a lot more than shopping list and it has a voice recorder so if you are in the car and need to add something to your list, you can add a voice note to an existing list.

oh yea, and its free
 
Shopper looks real nice. I'm going with that one :)

I've been using Notes, but there's no way to check off items.
 
Shopper works really well. It has a nice interface and is easy to customize. You can even create folders by aisle of your regular grocery store and add items aisle by aisle. It comes with all the basic grocery items built in and allows you to customize. One caveat: it does not allow you to create multiple lists.
 
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