Mounting sucks. If you get one, pull the locking tab off the stock seat and rivet it on the bottom.
Comfort is okay for anything under 200-300 miles, after that, it sucks.
Backrest options are nice but adjustability features are limited if you are under 6' tall.
It's a good seat, but it's not a great seat and if you can't find one used, you're better off spending that money you'd pay for a new one on a custom fit seat tailored to your specific body type and ass shape.