It turned me off

Rating: Null/10 (13 April 1999)

After getting a strong, yet vague recommendation to see this film, I rented it. Unfortunately, I began watching during dinner, and the opening scene (in which a man's head is unexpectedly sliced into pieces) turned me off so much, I stopped the movie.
The reviews on this site are mostly positive, yet few mention this graphic violence. Is the entire movie this revolting? Did I make a mistake in giving up so quickly? Some of my favorite movies ("Blue Velvet," "Reservoir Dogs," etc.) have strong violent content, but wholly gratuitous violence like the opening of this movie just turns me off.
Is there anyone out there who doesn't like violent films who still found "Cube" worthwhile?