DS's school is using it as well. I found it to be very helpful when he was being bullied by another boy at school. They addressed the situation as a whole class, without any finger pointing or 'guilty party' kind of stuff. Granted, it was 1st grade, so I'm not sure how they handle it in the older grades.

He also grade skipped mid-year last year and nobody mentioned the "social curriculum" he'd be missing out on- if that makes you feel better!