I feel really badly that this movie is on the list of worst according to average vote. If you consider that it relies very much on slap-stick humour, which does not appeal to everyone, that might explain its poor showing.
The movie is best compared to "Home Alone." I feel it is by far the better of the two movies. Dennis is wide-eyed and innocent and the slap-stick scenarios are 'accidental' rather than contrived as in "Home Alone."
This is a movie that elderly parents can watch and be guaranteed to have a good time. It is also a movie that kids will love. If those in between can't appreciate it, that speaks a lot for their loss of innocence.