Do you have any advice to help get used to no-line bifocals?

It has happened, I finally have to make the switch to bifocal lenses. I just ordered my first pair of no-line bifocals and the optician freaked me out a bit. He was explaining that it could take up to a month to get used to them. He went on to say that some people never get used them! Those of you who wear them, was it hard to get used to no-line bifocals? How long did it take you to get used to them? Do you have any tips to make it easier?