This is easily the most comfortable, spacious and luxurious Cadillac to date - till the 2020 Escalade hits the streets. It still uses GM's 3.6 Liter V6 and it's not especially fast, but it's easy on gas and a darling in traffic. My only disappointment is that the features from the XT4 and CT6 aren't available yet. Heated/Cooled/ Massage seats from the XT4 aren't available. The CT6's supercruise (auto drive) aren't available yet. The XT4, XT5 and the XT6 are where Cadillac needs to focus its attention.