It follows a 3 on 1 off; 2 on 1 off schedule. Not sure if I would say it works better for women, it all depends on the individual like most any training. If you follow the crossfit main site or someone who knows what they are doing when they create the programing the exercises work their way through with emphasis on certain parts, using others as accessory, etc. It is possible to over train following a poor programing or going to hard too soon.
I'd be willing to bet that there are some crossfit gyms in your local area that offer free classes on Saturdays or such. Quite a bit of them do. It's a good way to get introduced.