A few years ago I took a special time trial 6 week session, each session lasted 2 hrs. and the seat killed me! My instructor was upset with how much time I spent out of the saddle (but I was hurting) and I let him know that I had to do that or couldn't continue unless I had my own seat, so he allowed me to bring my seat (it took about 2 minutes to change out) on Schwinn, also works on Reebok. All it took was a screwdriver and allen wrench, but this was a few years ago, not sure if it works with the new models.