I don't know myself. I remember the opinion that it was shit was in the air in my country and this was before most people and my own family even had regular access to the Internet because of its cost. My older brother was even cautious about renting it.
But I quite like C64. I have fond memories of it from that time my family rented it. There were frustrating outliers like some platforming areas you'd have to restart entirely because you missed a difficult jump right before the end of the section (I specifically remember the Clock Tower and what might have been the first tower you had to climb before reaching the mansion). The Nitro section was also tedious (as whip-man anyway).
I picked up Legacy of Darkness for cheap years later and had an even better time, even though I still don't know what was changed between the two versions outside of the most obvious changes, and I haven't played the original since my first time to be able to compare and contrast.
The music and atmosphere is fantastic.And it is more enjoyable to play than SotN, the latter of which is just not a very fun game to play overall, even though I do like it very much.