My store does not have a sandwich machine.  My old store did for a short time.  It would trip a breaker in the electrical room and would be without power.  When someone fixed it the food had spoiled and the vendor had not been notified the power was off to the machine and did not replace the food.  That happened twice and the vendor took the machine away.  It was also nice for that short period of time we had the sandwich machine we also had a change machine.  My only problem with the soda machines is that there is not very many diet sodas or water (just plain water not that sugar loaded vitiman inhanced crap).