Good question. The comfort is definitely better than my FZ09. A lot of people replace the 1290 seat instantly because it's considered uncomfortable.

I haven't done a 600 mile day, but I have done 200m days and my tail bone is in pain at that point.

Seats aren't cheap for the 1290 so I'm still determining if it's my posture, my body type, or some other thing is the issue before swapping the seat.