I've done this trip a few times..to KC and all the way to Chicago then on to Milwaukee (starting in Albuquerque) Albuquerque can be a long stop if they are running on time. My big suggestion for Albuquerque is to NOT order food at the little snack bar in the station. You can get grab and go items but for anything that is cooked on the grill, the guy will take an order...cook the whole order..and give it to the cashier before he starts another order. No just going down the line seeing how many burgers, hot dogs, etc and getting them going. One...at...a...time. Odd.
I really enjoy this route..lots of great scenery, Raton pass, crossing the Mississippi. If you are going on from Chicago on a train, don't forget that there is a lounge there for sleeping car passengers. Very nice, TVs, seating, snacks and drinks. I wish LAX had a lounge..you would think they would, but no.