In all my driving of it so far (Emira, Sports suspension), I would say it is very comfortable and refined on the motorway, very good over potholes / similar and overall pretty good. To me it is more comfortable than a current Boxster on standard suspension. Overall in >200 miles it has been good. There was one short section of an A road that was harsh but I asked my brother who drives it most days and he said it is also harsh in his standard A Class Mercedes (a standard model, certainly not an AMG or even a moderately sporty one). I think the vast majority of us will end up being happy with whichever choice we have made as the difference between them isn’t huge and they are both good set ups.