Okay, I am not a big fan of Charles Jones later work. I preferred him when he was "Charles M" instead of "Chuck." But this cartoon has persisted to be one of my two favourite episodes of the Looney Tunes characters. There really is nothing poorly done about the entire episode. The script is wonderful and witty, the music subject matter is perfect, and the singing is spot-on (especially for voiced characters). While I feel that "What's Opera, Doc?" is a bit heavy handed, and was never one of my favourites, I will stop what I am doing just to watch the Rabbit of Seville whenever I see that it is on the TV.
If you value culture, or classic cartoons, this one has both. Many people in the West feel that cartoons cannot contain a cultural valuability that allows them to be either serious or even good. Well, I can honestly say that this one, while not serious, is actually a good piece of art, and stands alone well, proving to itself and other cartoons that even without seriousness, a cartoon can be more than kiddy jokes.
