With one small-ish exception, this is everything I was looking for in a shopping list app. For me, the best feature is I can have one master shopping list but only see the relevant items based on the store Im going to. I always disliked having a grocery list, Home Depot/repair list, misc shopping list, etc, and now I dont have to. :) I tried many shopping list apps and other list apps and kept running into issues getting a system like that implemented. Being able to share the list with others too (and allow them to edit it) is a huge plus.
The only thing stopping me from giving it five stars is I wish there was a way to add items to my list other than from within the app itself...like Siri or IFTTT integration, or email.