If you went into the Odessa Catacombs Museum in 1989 and today, you would see and hear the same thing. Nothing is factually wrong, but this museum-within-a-museum only covers the handful of years in which this intricate tunnel network was used by Soviet partisans in WWII. It is a great, living lesson in the soviet attitude towards history, since the catacombs were used for hundreds of years by smugglers and criminals before the USSR even existed.
The catacombs themselves are also incredible, just to see. There is an inscription on the walls that reads "Blood for Blood and Death for Death." It's impossible to read that and not think of the people who lived and died underground.