The new bulbs take some getting used to, especially with their slow "getting bright(er)" time. When we first installed them I felt like I had become one of the Mole People as everything just seemed so dark. And the quality of light is different, too, than the warm incandescent glow of filament bulbs.
BUT..... I put them in throughout our entire house and outside just as the electric company was going to raise our rates. So as our neighbors were ranting about their utility bill doubling, ours stayed pretty much the same and so I cannot complain too loudly.
When I first bought mine, I said that I was going to try it out and transition to them but I don't know. And as far as saving energy, I"m not sure how much more I can save. The only thing that is plugged in my house during the is the fridge & stove. Everything is off. My utility bill is about $50.00 a month but if I can get it down to $25.00, I would be happy. I may give it a try for a couple months to see what happens. :/