A couple of years ago I replaced a large proportion of the light bulbs in my house with CF bulbs. Almost immediately I noticed the savings on my power bill. I justified the higher cost and almost ridiculous disposal issues by the long term savings I was going to get. After all these things are supposed to last a crazy long time (up to 10 years - it says so right on the package). I eventually replaced nearly all the bulbs in my house.
Well as of now I'm officially changing my mind on that decision. The reason? These things are dying right and left. It seems that for 3 - 4 times the money I'm getting bulbs that are lasting 1/3 the time. In fact the vanity mirror and flood types are only lasting 10 - 14 months on average for me. That is far less than the incandescents they replaced. So much for long life. Now I've got a pile of crazy mercury filled dead bulbs that I'm probably going to have to pay to dispose of. So much for saving the environment.
I think this is another case where the consumer is being sold snake oil.