the saddle is not springy. You can't feel those springs. It is stable as it can be. Now the cons to this are that the springs add weight. if you are way freaked out about how many ounces your seat post weighs, don't get this saddle.
Because my husband is a little nutzo about that very thing, i tried 4 other saddles first. (that cost some $!) but i still came back to the b67 saddle..