Tips for using Boost for the 50% cash back
1. Before you even sit down, ask the waiter if Boost is accepted. Sometimes even though there's a sticker at the door that says "Boost accepted", they may still not accept it for a multitude of reasons , like "system down/offline"
2. Know what you're ordering, and ask to pay as soon as you have ordered. That way if something goes wrong (for example connection issues with the machine) then you can still cancel the order. The machine requires internet connection to function.

It's that simple.