Yes I hold my hands up to having done it (aaah - how wise I was before DD "oooh - I could never let my child just cry and cry..."
Ahem
Anyhoo - it worked a charm for us, and was NOT quite as awful a thing as we expected... OK, it was but bedtime was sorted within three days.
We had established the bedtime routine. Then it was a firm "Bedtime Now, nighty night, see you in the morning" queue that I was leaving and closing the door. Then crying. I went up every five minutes on the first night. Spent NO MORE than 1 mintue settling and then again "Bedtime now...etc". We had 25 minutes of crying. Next night, we decided it was 10 mintues wait. After 7 mintues, I couldn't bear it any longer and started climbing the stairs. Wuddayaknow... just as I reached the top of the stairs, she quietened down, and went to sleep. Third night, had about 10 minutes of grizzling (as opposed to outright screaming!), then off like a light.
BUT this was at 3 months, and I was still expecting one wake in the night. When I gave up breastfeeding at around 6 months, I couldn't cope with the idea of middle of the night bottles, and realised when she woke, I was nursing back to sleep, because it was easy. I also speak for a friend of mine who after 7 months decided she couldn't cope with the wake in the night any longer. For both of us the experience was slightly more traumatic. Much longer bouts of crying, and more like three or four days to crack it, but sticking to the 5 mins first night, then 10, 15 minutes thereafter (or 5, 7, 10, if you can't bear the 5 minute jumps). Again, VERY important to stick to the deal. 1 minute of settling and not more (perhaps offering plain water JIC of thirst). Then leave the room "bedtime now". We both experienced about 45 minutes on night one, and then half that day two, and then only a bit of grizzling from then on.
They key thing is to be resolute. If you make a plan you have to stick to it. Go bury your head under the pillow, or read a magazine outside. Don't just listen to the crying, because it will drive you mad and you may cave in!!!
It's hard, but it rarely more than a few days to sort it. Sorry for going on, there are many against CC, but I for one found it worked and now I have my blissful 12 hours a night and everyone is happy... Good luck.