I cannot think of any drawbacks. I could ride fifty miles on stock seat before stopping, a hundred miles on the Mean City, and 1000 miles a day on the Ultimate. I wont say the butt hasn't got sore, butt not like it used too.
What you own is your own kingdom, What you do is your own glory
What you love is your own power, What you live is your own story
In your head is the answer, Let it guide you along
Let your heart be the anchor, And the beat of your own song.......Neal Peart