We've attended the Mt. E. antenatal class and... well, I can't recommend it neither discourage you from taking it.
Generally speaking for us it was too basic most of the time. Listening for up to 45 minutes about how important it is that the father to be will help and support mother to be is not what I was expecting from such kind of course. It is so obvious for me that both parents should be involved that I personally found it annoying a bit to spend so much time talking about so elementary things
Also, the information provided were very basic, especially about the changes during pregnancy and lactation. Maybe it is me, because I like to know what will happen to me, so I've been reading books and browsing through internet a lot, hence I didn't gain too much of a 'new' knowledge from the classes. On the other hand, it seemed that the rest of the group sort of benefited from it, so maybe it was just not right for me.
Luckily, two last sessions were more informative, they were related to birth, pain management, hospital's policy etc. It was worth to know what kind of attitude the Mount Elizabeth personnel have toward your birth plan and other important issues.
It consists of 5 lessons, during two first one you will have practical part with exercises to stretch a bit and to learn how to breathe. One class is run by the lactation consultant, the rest by a midwife/doula/chief of the nurses Ms. Zara. Zara is very enthusiastic and energetic, and that's a positive thing. However, I am not sure is she is running all of the classes.
It also gives you a chance to meet the people who (Zara and her friend), who you will later meet during your hospital stay.
Summarizing, it depends what you are looking for.
Other places I've been recommended to choose from were Birth and Beyond and Mother and Child. The latter I know from yoga classes, which are good, but some time ago I've read on this forum that their antenatal classes are a little unrealistic, picturing a labor as a fully spiritual experience, without any physical aspects, which is not truth
On the other hand the antenatal class in Mt. E. was neither too drastic, even though there were pictures and a video with realistic images
Thus, I can't really compare the two.