 We have owned our 2014 Optima LX  for over a year now.  over all, we are happy with the car. Plenty of power, good cornering, nice ride, very sharp design.
The front passenger seat is very low. I had to buy a cushion for my wife.  The back seats are a bit low also.  The steering could be a bit firmer.  We have the car in for service now with a coolant leak.  This is our first Kia so we will see about the reliability.  It is fun to drive so I hope it is a keeper.