Okay the thing is really just to get something in your cart. I just kept trying to grab things until I was able to get something in my cart, and once you do, there is a 30 minute cart hold. Things go REALLY fast so you can go in with an idea of what you want, but it ends up being kind of whatever you can get. BUT, once you ahve something in your cart, it's yours, as long as you check out within 30 minutes. It goes super fast, but last time I was about 8 minutes late and I still got 3 bags of tarts.