Has anyone used the Taking Cara Babies courses and it actually work?

My baby is 5.5 months old and is getting up every 45 minutes at night and I'm just absolutely exhausted, we thought it was the sleep regression but it's going on 3 months already. I have tried every sleep sack, every sleepy cue and just about everything that people have suggested. I work full time and do not have support at night due to my husband working nights. I'm getting desperate. A few people have recommended this course but I would like to hear from other moms who have used it if it actually worked for them. Also what was the cost? is it like a video course? or just slides?