I downloaded it as soon as it was available but I haven't done anything except do a baby/toddler room and a playroom. My sims kids are just teens right now. I didn't want to start over so I'm waitin...
There area a few new interactions with babies and the infants are just a lot of fun to watch. I'll have to wait for the new feature glow to really say how good it is. I love it so far.