I have been flying with progressives for some ten years. I never had a problem
adapting to the progressives, and am at a loss to understand why anyone would
want to deal with lines in their vision if they didn't have to.

There is one tiny issue that I have noticed with my flying, but find it more of
a curiosity than a problem. After I first roll out on final, I have had more
than one CFI complain that I was not lined up with the center line. (I always
arrive in the right place @ the numbers, so I see this as a non-problem.) In
fact, I think that the issue may have disappeared completely as I have learned
to concentrate on an imaginary extension of the center line as my cue and not
the apparent angles of the runway.

Vaughn