The sleep deprivation in the beginning necessary to reset your sleep and circadian clocks, was hard. So I felt tired during the day at the beginning and probably for the first month. It may sound like a long time but compared to years of absolutely shitty sleep it was well worth it.
It's best to find a therapist trained in it to help guide you. But if you don't you can probably go it alone. Better with a therapist though.
It's about creating new and better sleeping habits. We all have bad ones, their easy but changing them is hard. Once you do though it's great. I go to bed and get up at about the same time everyday, within about half an hour. I fall asleep quickly and stay asleep. I don't wake as much, a couple times to hit the head and to turn over but then I'm in dreamland again. My extremely bad nightmares have all but gone away. I still have one from time to time but not as bad or severe. And, best of all, I get up and feel rested.
Once in a very great while I have a time when I wake during the night and can't get right back to sleep but it's so infrequent that I don't even think about it at all.
Like all things, changing habits is the tough part. Like quitting smoking. Did that years ago. It was hard but worth it. Again, it was about changing habits; cig after I ate or with coffee or a drink, ect.
All in all very much worth the effort. If you have any other questions Dan let me know.
Jar