I took my son to Gymbaroo last year for two terms. I did find it beneficial in some ways, but did not get what I wanted out of it 50% of the time. My son has a very unique personality where he prefers to play on his own, doesn't like big crowds of people and gets quite embarassed easily.
I initially took him so that he could socialise with other children more, not realing that it was not meant for that, but rather, a more mother/father and child thing. He has always been very advanced physically (like sitting at 5 months, walking just after 10 months), but when there, he would rather draw on the blackboard than use the equipment (which was really only allowed 15 minutes).
I found that the classes were way too expensive ($15 for 45 minutes); he cried half the time because he had to leave the blackboard behind when the music came on and half the time I would really stress out and break into a sweat. When he wasn't crying, he would bury his head in his hands from embarassment when the songs came on and we sang. Don't know why, but apparently I was shy like that too at his age until I was a teen. Bottom line is, he just didn't enjoy it and and because of this, neither did I.
I don't want to knock it, I saw some kids having a blast and really getting into it, but for us it was a waste of time and money. Now I take him to the playcentre every Sunday: for $15 he plays for about 3 hours, we have chips and a milkshake and cappucinos for me and hubby. Plus, I relax and am stress free as we take turns watching him.
I always recommend my friends (the newie mums) try Gymbaroo for a few sessions though, just to see how their kids take it. It can be worthwile for some, but not for others.
Vaccines: Question what you're told...