Does anyone use those new low energy florecent bulbs instead of the regulars?

we been using this bulbs for over two years now and it does really cut down the electric bill and it help with the mother nature too. i cannot tell you the exact amount that we're saving coz my electric bill doesnt fall at the same amt every month it depends on the weather, the lowest electric bill i receive was when it hit spring and fall coz i don't use so much electricity for heater or aircon.