I have been using these since before they were cool also. I like them not for the fact they save me money (cause if they save me money, its only pennies compared to my electric bill) but for the fact they last almost forever. And, when you have to get on a ladder to change a bulb, when you are afraid of heights, it means a great deal not to have to change one for 5 or more years.
I used them in my basement (where the light stayed on almost 24/7) cause we are fraidy cats and wouldn't go down there without the light on! When we moved, I took that bulb with me and put it in my next basement. It lasted 8 years! of almost continuous use. I got it from my electric company for $4.99.