Some bugs I have noticed and you may run into them:
• Gets stuck on "Loading" circle screen overlay — there's a "Loading" circle after a transaction finishes and you can see the "Scan Item to Begin" screen under it, but the loading circle won't let you do anything. It disables both scanners so you can't even use your Speed ID, and can't even throw it into Store Mode with the button.
You can let it time out (and slow down your entire line), or you can "pop the 'hood" and remove the receipt paper. This will force the SCO to freak out and display the "A Team Member is coming over to help" screen, which takes priority over the loading screen, and now lets you put it into Store Mode. Replace the receipt paper and close the register top part. Since this is technically a "system error" you've "caused," you can't use the scanner with your Speed ID, so you have to throw it into Store Mode manually with TM#/PIN. But then you can just click "Exit" and it's back on ready for the next Guest. Beats waiting 5-7 minutes for the Loading screen to go away.
We have noticed this happens mostly after a cash transaction.