This episode gets such a bad rap. Maybe it's deserved, but I enjoy watching it. I can follow it, the story is interesting, if rushed, and I get a laugh out of how man times Lazerus falls off cliffs, screaming as if plummeting into a pool of lava.
But it's not dull! Mark of Gideon, Charlie X, Whom Gods Destroy and Patterns of Force (not to mention I, Mudd and A Piece of the Action) are all episodes I'd avoid pulling off the shelf. I would watch The Alternative Factor 18 times more than any of those.