The food at Cafe Supreme is pretty good quality, their bread and butter is the sandwich and two salads for about $10 with a drink, which compares favourably with food court prices. But the real draw is that you don't have to eat underground in one of the PATH food courts amongst the masses. They have their own seating at fairly nice tables which are actually above ground (in fact you can even see out of some windows). In the summer they have a small patio outside. It's not the kind of place you would want to go to every day as the food would get a bit repetitive, but every once in a while it's a nice change.
Be careful as Cafe Supremes are not all created equally, some are better or worse than others.