I’ve been driving Scania’s for the last 18 months and found them to be really uncomfortable and on the whole a bone shaking ride. This was the type with steel front suspension and the cab suspended on sprung shocks 
Well - I’ve now got a new unit and its a Scania with air front suspension and an air suspended cab 
I just cannot believe the difference in both comfort and drive it is so much better. It definitely holds the road better and I feel far less tired at the end of the day 
Its amazing what a bit of air can do to a truck!