I have a 2014 Pentastar in Our Family Minivan. It's a powerful and efficient motor. We are about to 75k miles. The water pump exploded (dealers words) at 2,600 miles. I just had to change the oil pressure sensor out of warranty and it was pretty expensive at close to $500. The part was $49.00 but they "had to take the top of the motor off". After watching a you tube video they had to remove the upper intake as the sensor is attached to the oil cooler. I know it's not a Jeep but the motor is the same. Other than those two things it's been a great motor.
I would buy another vehicle with the Pentastar without thinking about it. .
Thanks