Martha Wells wrote a trilogy called "The Fall of Ile-Rien", excellent books all of them. This would be what I would classify as a 'good' example because the world jumping wasn't wish-fulfillment, it was part of a war.

As for the bad and the ugly, yep, I've read them. I think it's better not to name names. But I still have a copy of one because it's incredibly funny read aloud--and the improbably-named heroine might as well have been named Mary Sue.