I went to QEC too for a day stay as well so won't repeat what Jodie has said. Once we got home it took us about 2 weeks to decide to give it a go, it is hard not to pick up your baby when they cry if you aren't used to it so we had to make sure we were ready to do it. I agree with Jodie - prepare yourself for a rough time and support each other.
For us it took one night one week ago and for the last week she has only been waking 1-2 and settling really well. I would add that the key is CONSISTENCY!! Once we started we told ourselves to be prepared to give it a go for a week minimum before we would re-assess different solutions.
Good luck and let us know how you go!!