Everybody's different, but personally, I'm glad I don't have CV joints on my prop shafts. I can change U Joints easily enough and get the ones with grease fittings so they will last longer than OEM and they are reasonably priced compared to CV joint shafts. U Joints also don't have rubber boots which can be torn by sticks requiring replacement. If I have to do the work to replace a CV boot I'd just as soon replace a U Joint.