Ebert liked Dark City enough to add it to his all-time Great Movies list (and wisely so, I’d say). Read these AFTER you see the movie; some spoilers…
His original review:
http://rogerebert.suntimes.com/apps/pbcs.dll/article?AID=/19980227/REVIEWS/802270304/1023
His even more adulatory reassessment:
http://rogerebert.suntimes.com/apps/pbcs.dll/article?AID=/20051106/REVIEWS08/511060302