It didn't do well critically, but audience scores on many platforms are 60-70%. It came hot on the heels of The Matrix, has similar themes, but nowhere near as ... everything compared to Matrix. I'd bet the only reason it did so poorly critically is due to the timing of the release.

It's a fine movie though.

If you like Matrix, Memento, Truman Show, Black Mirror (San Junipero, Bandersnatch), Inception, Interstellar, 12 Monkeys etc. you may also like it. These are not necessarily thematically aligned but based on vibes they cluster near it for me.

I definitely enjoyed it many years ago as a younger person.

Three movies with overlapping themes came out in mid-1999: The Matrix, The Thirteenth Floor, and eXistenZ (probably in that order of box office revenue).