Got my first pair of progressives over the summer. I didn't have any trouble adjusting to them at all. Reading in low light was getting tough, but the what really pushed me to getting them was reading music. That distance was getting increasingly bad.

My uncle the opthamologist told me that I should expect to change my perscription several times over the next decade, then hopefully things won't change much for a long time. We'll see. (Alas, he's retired now, so no more free eye care...)