once i went business, i never went back.
for flights more than 10 hours, i would highly suggest it. the cathay pacific business class is so comfortable, my 16 hour trip from vancouver to HK then saigon feels like 4.
so to answer your question, yes and no.
yes, in that it's fucking awesome where you don't have to wait in the long line ups and they serve you free booze in the waiting lounge and plane. i always drink a shit load, to pass out and get my 3700 worth!
no, in that you're paying about double the airfare for a flight that will feel short.