2016 Cadillac ATS Standard 4dr Sedan (2.0L 4cyl Turbo 8A)
Biggest downside, car is it's a large compact. After that watch out it is a fun drive. Great cornering and excellent acceleration provide an excellent feel behind the wheel. The car is 5 star safety in every category making the overall experience that much better. Had previous experience with 2.0 turbo and it was problem free although I only drove it for 50k miles. If you are not looking for a large sedan this could be your car. Drive it and you will like it.
2016 Cadillac ATS 2.0 turbo luxury AWD trim is a great handling car. As many others have mentioned already, the vehicle is slick, drives extremely well, handles confidently, and overall a great driving car. When the sport mode is selected, the wheel and suspension gets noticeably tightened and gear changes at higher RPMs to allow for a quicker acceleration, which all makes it a very nice sporty experience. One feature I do not like is that the luxury trim does not have the HID lights (higher trims do have it). Halogen lights does the job, but it is nowhere near the brightness of HID. Backseat is cramped, but for small to normal sized people, it isn't uncomfortable. If ATS makes HID standard and add a couple more inches to the backseat legroom, in my mind, it would clearly beat BMW 3 series. Until then, it is so close, yet so far from the 3 series benchmark. At the same time, when I'm in the car by myself driving in sport mode on the highway, these couple of minor inconveniences are an afterthought. At 272 hp and 295 lb-sqft, the 2.0 turbo is the real steal among the trim offerings in my opinion. If you are looking for an entry level luxury sport sedan, I highly recommend you test drive the ATS 2.0 turbo and test out the acceleration and handling. You won't be disappointed.
Update: After 19k miles, the car is still great. No issues. Runs and handles excellent. Still loving the nimbleness, acceleration and instant power.
2016 Cadillac ATS Performance 4dr Sedan AWD (3.6L 6cyl 8A)
This car in my opinion is a driver's car. The 3.6 liter V6 is very responsive, it makes nice noises. The chassis corners flat, the transmission bangs shifts off with authority, the steering is great and with the V Sport brake option I can keep out of trouble.. When you want to be sedate and laid back the ATS accommodates so nicely. Drove the car out west for vacation. Interstate highways were gobbled up with 32 mpg. Twisty mountain roads are where this little sedan shines baby! In sport mode I was hitting apexes at twice the limit and asking for more.