Just had to say - I am 100% with Duckie on this one!
I swear the moment I say it aloud - it changes. Unfortunately this backfired for myself and my SIL a few months ago. She came over and put her DS to bed and I said - wow isn't it great having kids that can just go to sleep with so little fuss - the 2 of them have been having sleep problems ever since.
If it's going well, don't say it, don't think it - just enjoy it !