Nope. Too damn distracting.
If you absolutely must 'watch' it, then just 'watch' it -- put it on mute, avoid the market commentaries and idiotic sound effects and incompetent punditry (*cough* Neale). Don't 'listen' to it. And if CNBC runs any more than 3 people on a screen @ one time, immediately switch to the Weather Channel - you'll get more useful trading advice there, trust me. Remember, CNBC is now basing most of its programming on opinion and conflict to pander to the amateur viewer with an interest in news.
Frankly if you want what I find to be generally useful financial news, analysis of possible investment/trading ideas presented in a low-key fashion, head to Bloomberg. I like my business news boring, not glitzy and full of special effects and on-air screaming matches.