I second this. I've had my '16 Premium I for only a month, but it has been perfect and astonishing. A big car that doesn't handle like one, smooth and nimble, swift, efficient (for its size and HP) on regular gas. Mine is garnet red over cream (I don't do black interiors), 18" wheels but higher-profile tires.The 2017 and 2018 models are the newer versions; 2016 was the last model year for the earlier version. I have a 2016 Leather with the 3.6L V6 (LFX) and it has been absolutely perfect. Now with about 38,000 miles on it. Great car/solid.
If the '17 had at least a defeat button for the Auto Stop-Start. I'd have gone out to test-drive it. I love the way the new generation looks, and no doubt they are improved over the already excellent 2010-2016 model.From an engineering point of view, the '17-'19 generation is far superior to the earlier models. It has the newer chassis design, 5 link rear suspension, LGX engine, 8-9 speed transmissions, optional twin dual clutch AWD, improved Intellilink and a lot more. Styling is a personal choice, but to my eyes it's also much improved over the previous cars, both inside and out. For these reasons I would recommend the newer model.
Benefits I could see for the '15-'16 cars would be lower price, slightly taller which probably makes ingress/egress a little easier, more upright seating position, no start/stop (which is actually not an issue at all to me but some people do not like), conventional shift lever (I like the new one but some don't), and if you prefer the styling.
Quality seems to be just as good from everything I have ever read. My car has had zero problems in 23,000 miles but the last generation also has high quality. At the end of the day they are all good cars so it comes down to personal preferences on styling and/or features and price that are important to you.
I'd seen an aftermarket device for the Regal TourX and Sportback, but I didn't see any mentions of this for the new LaCrosse. And you say flicking the lever into manual mode and back again will defeat the auto stop-start for the duration of the drive? You'll need to do it again when you restart the car, but it remains off until you switch off the ignition?I agree the auto start/stop has turned out to be a non-issue for me as well. GM did a very nice job engineering this. I won't say it is imperceptible because that would not be true, but it is unobtrusive. As you said, it can be defeated by toggling into M mode if you must. The electronic shifter makes that incredibly easy to do. It's spring loaded so you just flick the lever down to go into M mode, release and it returns to center position, then flick down again to toggle it back to D mode. If you Google there is a company that makes a device to disable the feature. It plugs inline into a harness in the engine compartment that controls the start/stop. Can easily be removed and thenyou are back to stock. But again, its not necessary as far as I a concerned.
I will do some experimentation with the M mode and post here about it. However I must say that my experience with the auto stop feature is that is almost a non-issue. When I posted previously that the engine starts in less than a second after releasing the brake in my case it is almost instantaneous.I'd seen an aftermarket device for the Regal TourX and Sportback, but I didn't see any mentions of this for the new LaCrosse. And you say flicking the lever into manual mode and back again will defeat the auto stop-start for the duration of the drive? You'll need to do it again when you restart the car, but it remains off until you switch off the ignition?