The idea is great but the app could be improved. First, sellers should not be allowed to change the time after collection time has started. It's annoying and quite a waste of time to get there for collection only to be told the time has been changed. Also, sellers should get a one hours reminder to prepare the bag. It's weird when they are clearly scrambling to prepare a bag with whatever while you wait. Finally, buyers should be able to select a non-vegetarian option.