Has anyone here done a sleep training program?

My friend recommended ABC’s of sleep. I’m just wondering if anyone else here has used it as well or has another recommendation?

Kinsley started waking up every 2-2.5 hours through the night around 6 months and it never stopped. My mom is visiting now and it’s exhausting all three of us to take care of one child because she doesn’t sleep and when she’s awake, she doesn’t stop moving.

If I knew I’d get at least 6 hours of unbroken sleep a night, I think I’d feel much better about her leaving in September.