I enjoyed the scenes in which Rudd first tries to function in a world of giant household objects, but only because they reminded me of The Incredible Shrinking Man (1957).
At the end of the day, frankly, any film that references The Incredible Shrinking Man so beautifully deserves its moment on the stage.
The rest of the movie, with simulated direction from a mixing-lab keyboard by somebody called Peyton Reed, is a series of stunts borrowed from such sci-fi classics as The Incredible Shrinking Man and The Fly.
It seems a pity, though, that the screenplay didn’t have the guts to emulate the wonderfully ethereal close of its real progenitor, Jack Arnold’s “The Incredible Shrinking Man” (1957).
We've seen some of these tricks before, most effectively in 1957's The Incredible Shrinking Man and 1989's Honey, I Shrunk the Kids.
As for the effects, they're generally excellent, particularly in a bravura inner-space sequence that hearkens back to the 1957 classic The Incredible Shrinking Man.