BioSehnsucht
Model 3 LR
Interesting to see how people have wildly different results.
With my 2015 Model S (running AP1 and V7/V8/V8.1) I typically never used AP because I felt like it took more effort to use than simply using TACC. It would do things like diving for the exits, and there was a some instances of truck lust.
With my Model 3 running V9 I decided to let AP do the vast majority of the driving from Snohomish to Portland, and back. I wanted to use the dash cam feature to document every instance in which it messed up. So I could go back to determine the exact location, and what it might have been thinking.
In that 400+ mile journey I only had one case where there was what I considered to be a significant mistake. That was a false braking event that happened as the result of a overhead road that I could easily see why the car thought it was right in front of it because it was right before the freeway dipped under it. This was on 405 going Northbound right about the time I was thinking "hmm. I haven't experienced any phantom braking yet".
Now it wasn't what I'd consider a lot of braking. But, just maybe 5-10 mph lost as I took over. I didn't have anyone close behind me, but it's still a pretty busy freeway. I'm too self conscious to let things run there course.
Here are my conclusions
False Braking -> One event in 400 miles
Lane Changes -> Overly conservative. It seems to give a second or two just to go "hey, guys I'm going to change lanes", and then it executes a perfect driving miss daisy lane change. The kind of lane change I'd do if I was driving a CEO. It also seemed to require an excessive amount of space behind, and ahead. So it was best used in non-aggressive traffic.
Zig-Zagging -> Didn't notice anything significant. Maybe some wobbles here, and there. Probably outdid average human drivers.
Lane Placement -> Still not a fan of the center in all situations
Truck Lust -> None
Diving for the exit -> None
Lane Change over Solid white lane into HOV lane -> Wouldn't let me
Nags -> Excessive. With the Model S I could hold the steering wheel in such a way to all, but eliminate nags. No such luck on the 3 yet. The warning message is easy to see so I didn't have any major issues with it. Just a little annoying. I'll try a different steering wheel setting next time to see if it improves it (I have sport selected, and it's tight like I like it).
Sensation of using it -> Felt a lot more natural than AP1 did. AP1 tended to constantly do micro corrections. AP2 felt more human like.
The 360 degree visualization -> Comically funny at times, but it was pretty awesome at helping situational awareness.
Final conclusion -> Could use some mad max.
Disclaimer -> I naturally intend to take control when things look like they might get dicey. So I can't say what AP would have done when dealing with weird crap that happens on the roads sometimes. So my analysis is really just 90% of driving on the freeway. I also did most of the more difficult lane changes that required tighter tolerances, and higher aggressiveness than it was delivering.
Now I don't know if I'll be converted from a TACC guy to an AP guy, but it was certainly a large step.
I dabbled with sport steering setting but found it took more effort to keep AP happy, and honestly didn't feel sportier to me (just underboosted - the steering ratio is already great, and the steering settings only adjust amount of assist / boost). With standard steering, I can just barely put some torque on the steering wheel by sort of "leaning in" to either the left or the right against the wheel with my index finger, with my hand resting on the wheel. Very minimal effort required. On v8 anyways, still don't have v9, so if they made it naggier... who knows. So I'd suggest trying standard steering and see if that makes your AP nags less of a hassle.