Hi, Bethany and I went straight into a 3 night stint at tweddle (think the chick on the phone could hear the edge of hysteria in my voice, because we actually ended up on a standby list and were in within 2 weeks), and for us it was the best thing we ever did, but it was also a lot of hard work.
The best thing about staying is that this is all you need to concern yourself with while you're there - no dinner, no dishes, no washing, just you and your baby.
The other thing was that because everything is new, the babies tend to ark up maybe more than they would at home because not only are you behaving in a way that they don't like or understand and that isn't familiar, but everything looks, feels and smells different too.
So at least by the time you come home the only difference is the things that you learnt while you were away, and they do eventually get it (some in as little as 3 weeks, it took us 6) - so yeah, you do have to persist, and it's hard, but it pays off.
Bethany screamed so hard and for so long while we were there that she actually lost her voice and it broke my heart, but she did eventually go to sleep and it does get better.
Best of luck