I live over in the states, so the classes may be a little different than the ones provided over there, however they are offered by the education department of the hospital I'll be delivering at.
So far I've taken:
Early Pregnancy - good, but I think more for the OH's in the group
Pregnancy Fitness and Nutrition - good, but not necessary if you just read a bunch online
Late Pregnancy - fantastic class where they went over what to look for if you think you are going into labor, when to call the hospital, every item they may use on you while you are delivering, and what to expect realistically if something doesn't go according to your birth plan. Also included a tour of L&D and PP recovery
Ones I have yet to take -
Preparing for Childbirth
Breastfeeding
Newborn Care
My thoughts on it are this - If you're not a first time mom, then the classes may be a waste of time. However, if you ARE a FTM like me, I've found all the classes to be at the very least somewhat helpful, and at the most very entertaining and educational. I always feel like I can't possibly know enough, so I'm taking everything they will pretty much offer on the topic.
I am in the States and my class covered pretty much all of these topics. It was a disaster, like I said.
Early pregnancy was more geared towards early/late teens who never had any sex ed in school, pretty much. Zero value.
Luckily they skipped the nutrition part, because I horribly disagree with anything and everything a person in a white coat has told me in the US about food. But that's because I don't eat the American diet, pretty much, so cutting down on soda intake and similar advice means nothing to me.
Late pregnancy and signs of labour made people panic, basically. According to our little nurse/instructor, you should run to the hospital to get tied up to machines and then immediately cut open if anything happens. Anything being early labour or broken waters, etc. Brrr. Scary. I actually argued with her for a while, then figured it was useless to waste my time and had a chat wity my doctor instead (he's from the same hospital, yet doesn't do the massacre-related things she talked about).
Preparing for Birth was tolerable, but the one about birth itself was way too scary, though. All I learned is that, once I step through the hospital door, someone is going to rip me open, pull the baby out and make sure I am high on all kinds of sedatives and other things. She also made sure that everyone knew they'd feel nauseated and that there will be puke leaking all over the place. Very encouraging things to be said in front of about 14 first-time-parents-to-be.
Breastfeeding class was okay, especially if you knew nothing about breastfeeding. But this one was not held by the same witch who did the rest.
Newborn care was okay. Especially the part where I finally
learned something - dates when our department of transport, or whoever, will do child restraint system checkups for free.
Ick!
Can't wait for the other session to start. Hopefully those classes will feel like a toilet brush, wiping out this nasty content out of my head.
(I have to admit I love the Mayo clinic pregnancy book, which is again written by people who work for the hospital I go to. So I have no idea who prepared this childbirth education torture, or why the girl teaches is the way she did.)
(although I happen to agree 
) I'm going no where near that thread though!!!
If he just happens to be a bit smelly that day... but generally he's a clean guy.