I did two flights, one in the 727-100 the other in the 727-200, and the Autopilot worked perfectly on both of them. From the time I turned it on to track my flight plan, right up to capturing and following the LOC and GS. I only turned the AP off at about 100ft AGL, just beyond the RWY threshold.

This is the CS AP that comes with 2.3 and not the one that has been modified and is offered in the other topic here.

Mark