So I'm still on 42.3 here in AZ, but I want to do a quick summary of my experience with AP (and NOA somewhat).
In general, I love it for use in medium to light traffic on the freeways here in the Phoenix area. They are generally pretty straight and in good condition. But, when traffic is heavy, I really don't use it much as it is just not aggressive enough to make lane changes. Yes, I know, NOA is a BETA feature.
Complaints:
* Carpool lane - the car won't get in or out of the carpool lane with a solid painted line. Here in Phoenix, it is legal, so I have to disengage or override, perform the lane change, then re-engage AP (autosteer).
* Carpool lane - when in AP in the carpool lane, the car seems to like to move closer to the solid painted line that is the slower lane to the right. When there is solid or stopped traffic in that lane, and I am zipping by these cars very close, it is unnerving. Some say it is perception, but looking at the car on the screen, it seems to get closer to that line. AND, the car will often slow down abruptly I presume because a stopped or slow car is close to that painted line. I would add an Offset option tied to the carpool lane, say +Left + Right xx inches, or a "Keep on outside" option, or maybe add that functionality to the right steering dial (left to right would be offsetting the car in that direction).
* Swerving - when in AP, the car is slow to enter turns and ends up on the very outer edge of the lane, and then is slow to straighten out and ends up on the other side of the lane, then it eventually centers itself out in the lane. I OFTEN have to intervene or even just turn off AP (keeping TACC on) because the car gets WAY too close to the adjacent lane car. My guess is that the closed loop parameters are not tuned properly. Is this a car specific thing, a calibration thing or a general software/hardware capability thing?
* Heavy traffic - I generally just don't use AP and NOA, and mostly TACC. It is just too slow to react to potential openings for lane changes, keeps way to much space with the car in front, reacts slowly to the car ahead starting up. I wish TACC would be available without EAP.
* AP lane changes - I've noticed that, after requesting a lane change through the turn signal, it sometimes will either wait a long time, hesitate, start the lane change and stop it (return to the original lane), or not do it at all ( all with a clear lane). In addition, if I request another lane change right after the first one is complete, it just won't do it and I have to attempt it a second time. Even if I requested a lane change while the first one is being performed, it should be able to accommodate. All this just looks like I don't know what I'm doing for cars behind me.
* Mad Max - yeah I like it but, again, it just seems to take so much time for decisions to be made. By that time, it is too late.
The good:
* Phantom braking - seems like this has been pretty much eliminated for me. It used to happen a couple times a week.
* Slowing down - AP seems to do a pretty good job at predicting turns and slowing down. However, I think it is very very conservative and slows down way too much making the traffic behind a little leery.
So in general, I really like the technology and obviously paid to get it. However my biggest grippe is the Swerving. If that would be improved or eliminated, I would probably use AP much more.