Installed this mod of the Captain Sim 737 yesterday, and today completed my first test flight from KSEA to KPSC.  I must admit that I have become adjusted to (spoiled by?) the current autopilot features such as climbing to a preset altitude, setting vertical climb speed, GPS etc.  But for the early 737s these options did not exist.  I remember first learning to fly for real in a Tri-Champ that didn't even have a radio.  Had to advance to a Cessna 150 and learn to use the radio before I could complete the training for my private pilot license.  This was in the early 60's and none of the planes I flew back then had autopilots.  Maybe that is why I am enjoying this CS737 mod so much!  It does have GPS and altitude hold, and the PDCS works very well, as discussed in the user manual.  Am looking forward to some night flights next so I can explore the Spotlights feature.

I highly recommend this mod for anyone who has the CS 737.   :) :)