I am not a fan of controlled crying either. I think it just extends what could be all over in a couple of nights of "extinction". Tell them what you're going to do; "You need to go to sleep in your cot now and Mummy will be back in the MORNING when it's time to get up." Then close the door and put your fingers in your ears.
But, that's just the mean mummy side of me coming out.
I even do it with O to a point. I go in and settle him a couple of times, but once I know he definitely does not have a burp to do or anything, then he needs to be left to fall asleep, even if he cries a bit. I think it's more unfair to keep letting him fall asleep in my arms, only for him to wake up in his cot and get a fright and start crying. It's swings and roundabouts.
Letting him cry for 10 or 15 minutes and then him having a lovely long sleep is far better, imo, than snatches of sleep here and there over a period of hours, just because I'm determined he won't cry. Plus I end up stressed to bits doing that "tippytoe to the cot with sleeping baby" thing, only to have them wake up and cry 5 minutes later, just as I sit down to dinner.
Tell it like it is and stick to it. L is a blinking genius at playing you, PJ. Won't take her long to work out that controlled crying means "If I cry for longer, Mummy will come back."
Two or three nights of extended crying, while you're feeling "stong" is far easier to deal with than two weeks of controlled crying where your resolve weakens as time goes on.
Just my opinion though. In my house, whatever gets everybody the most sleep in the shortest time possible is what works for us. Just depends on how much you can man up! I find it hard to stick to anything for long...