I loved my classes, and even though I ended up having a CS they were still valuable (I did the CS class even though most opted out of it) A few of the girls from my class ended up in my mums group and 6 years on we still meet up on a regular basis. Go for it, it is one of the best times of your life make the most of it and if nothing else you will know the staff, which will be great when it comes time to giving birth and afterwards BF etc.
And look.... already good things have come from it, you have met local girls in the same situation.
Good luck and have lots of fun.