I live in area that has terribly high electric rates. After a major dispute with my electric bill a few years back (I won) I started looking at my bills much closer than I had in the past. At that time I replaced virtually all of the light bulbs in the house with CFL's. Hated them but they did save on the bill. Even the ones that were quick to come on were slow to provide optimum lighting. I have lots of dimmers in house. Dimmable CFL's don't work that well. I noticed that the lifespan of the bulbs were no where near what I expected or what was advertised. After doing a little research I found that a CFL is not a good bulb in situations where it is not just turned on and left on for long periods. Repeated on/off cycling really reduces longevity.
I was curious about LED's but the cost was just too high. Recently however I noticed that I was seeing some LED's that the cost was comparable to the CFL's. Costco started carrying more and more of a selection. I decided to try them out so as CFL's burned out I replaced with LED. I was so happy with the results that I went ahead and replaced almost every bulb in the house with LED's. They provided instant on lighting, dimmables work well, longer life span, and they burn much cooler than either incandescent or CFL. Wife actually commented this morning about how much cooler the kitchen is now that all the can lights in there are LED.
Bottom line is that I am sold on the LED's. Now if only solar costs would come down enough to make it affordable.