I think it's aged brilliantly. I do play a lot of older games so dated graphics don't bother me in the slightest - perhaps I should state that as some context. However, I still found the 2 main female vampire characters in the game to be smoking hot so surely that says something for the graphics!
It's thought by many, that the only reason the game isn't better known and regarded as one of greatest RPG games of all time, is that it was quite broken when it was released and the studio went bust shortly after the patch they released which still didn't fix some of the bugs. However the game now has a perfect unofficial patch and what's known as the plus patch which even adds new maps and quests. Best to purchase the GOG version of the game which comes bundled with the unofficial patch. You definitely won't regret getting this game - it's a truly immersive and unique experience.