They use less energy but they do not last longer. As a matter of fact several (5 each) failed within 8 to 14 months. Wrote the manufacturer (made in China as I understand they all are) and they said that the bulbs were not made to be used where they were turned off and on on a regular basis. And do not use with ceiling fans.
Since they will be the only bulbs available in a few years what does one do with their present lighting have to replace it all?
My understanding is that LED bulbs will be available in a couple of years or less and will replace CFL’s as the light source of choice. You can buy them now but they are pretty costly, one article said it could cost $100 or so to replace the lighting in a single room. Maybe someone around here knows more about this than I do. I know just enough to be dangerous!