If you've read Baby Wise, do you like it/did it work for you to get baby sleeping longer, like they say it will?

How do you all feel about Baby Wise (if you've read it?) I have friends that swear by it, they have three kids that are amazing sleepers. But honestly it makes me feel a little like a failure! They advocate the 3 hours cycle, but my baby eats closer to every two hours. They say around this time (6 weeks old) if you follow their method baby will start dropping a night time feeding - but my baby still eats every 2-3 hours through the night (occasionally she'll go 4-4.5 hours, but not consistently). I've seen a few people people that love the book and a bunch of people that hate it! 

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