2015 Chevrolet Impala LS 4dr Sedan w/1LS (2.5L 4cyl 6A)
I bought the Impala new and have thoroughly enjoyed it. Great for long trips with excellent seats and a huge trunk. Mileage for the 2.5 engine has been in the upper 30's on the interstate and around 30 in town. The only drawback is the auto shutoff on short stops (which is not something you can change). I have rented the V-6 models and the performance increase is very clear. I don't drive very aggressively so the 200 HP engine with the 2.5 is fine for me. Steering is great and you can see the similarity to the Cadillac XTS in the ride. I changed out the factory floor mats right away and that was an improvement. I like the LED lighting and there is an additional battery in the trunk (which is similar size to a mower battery). This model still has the CD player which may be something you like. Hard to beat the safety ratings and that is a plus in this area for sure. Sedans have not been selling very well so the price point is excellent. You can view the car complaints on the internet and you will find these are very reliable.
2015 Chevrolet Impala LTZ 4dr Sedan w/2LZ (3.6L 6cyl 6A)
I had my 2015 Impala for 8 months when the electronic parking system warning light came on. The dealer said it just needed a software upgrade. Two years later, same thing. The dealer doesn't know why it happened. They reset the instrument warning light. Two weeks later the battery goes dead after every system warning light came on the instrument panel. No warning light regarding the charging system. No "Battery saver mode active" message, nothing. The dealer replaced the battery, since they said they should have caught it last time. When I asked why none the of the warning lights came on, they said that's the way they build 'em. My first GM car and my last. How does a modern battery go dead in just 2 1/2 years at 36k miles???