I have been flying Frontier to LAX occassionally in the past month. On both the 7am and 8:50am flights there is beverage service and also a bagel (Plain or Cin/Raisin) with cream cheese.

The concourses are basically identical, and as mentioned before you can walk to the terminal instead of taking the train if you would like. I believe that DirectTV is available on all A319's with the $5 fee, it is free while the plane is on the ground and during takeoff. If you do not pay for DirectTV there is a map display that rotates with some ads occassionally on the screen.

I have been happy with Frontier the times that I have taken them, and it seems that their employees seem to care.