Curious what others think of the difference between the regular Ultegra shifting and the DI2. Do you think it makes a big difference? In what way? Is it a nicer, smoother or easier ride? Is it worth the extra money to do it? I don't plan to purchase a new bike for awhile and regret it if I don't get it now in a year or two, so wanted to gauge if others think it makes a big difference and is worth it now.

Thanks!