If you have to go through Denver, this is the place to eat.  Their food is fresh, made to order, and reasonably priced for airport fare.  You also get a lot of food for your money.  They have an outstandingly quick ordering and preparation system, so even a long line is cleared quickly.  I ate there going in both directions on a recent trip.  The first was breakfast where I had an excellent and filling burrito.  On the return trip I came through for dinner and had a grilled to order chicken quesadilla which rivaled any restaurant I have ever tried.  Nice job.