The Caravan is one of the most comfortable aircraft I've flown
The seats the Army put in 689 weren't that comfortable and for me I was at slightly the wrong position for the rudder pedals so at the end of the day I'd have sore calf muscles and ankles as at climb speed with a full load you were constantly making small corrections with the controls to eeek the max rate of climb out of the Porter. The rudder is quite heavy needing lots of right rudder on take off until the speed builds up.
The Porter is easy to fly but to fly it accurately and efficiently on climb you had to work it. I guess that's one of the things I liked about it , it was a bit of a challenge to get the quickest load time for the day.