Disclosure, I am a skeptic by nature.
When the stat 90% hit rate got tossed out it peaked my interest. What officers was this study done with? Beat cops? HRT/SWAT? What was the improvement of this same cross section of officers in hit rate compared to unaided by CT grips shooting?
So I went looking for the answers. Now maybe my search-fu is failing me today, but this supposed study by the NIJ
is no where to be found. The only references to it I can find are by people selling CT grips, and one article about NYPD training, which references the study and claimed 90% but only provides a partial citation (Heal, 2007).
I'd probably try them out, but regardless of their merits I am wary of the marketing claims.