I think the best thing about the Combatives website is the video.
https://www.benning.army.mil/videos/video16/
Some of the Risk assessments and packets don't get updated as soon as the changes are implemented at Benning. That's been a problem in the certification classes here.
The theory is that Level 1 techniques will be common-task for all soldiers sometime before I retire. I don't really know if it will happen as the requirement for NG deployments is a 4 hour block of instruction. The non certified people in my unit retained approximately nothing from that. Those of us that were already M.A.C. Instructors simply had to sit back and ask why Level 1 instructors were responsible for teaching brigade and battalion sized units techniques they barely understood.
Probably the most interesting things with the program are in TRADOC, most people going through basic and AIT these days are fighting either every other day or once per week. We had Company and brigade wide tournaments when I was an IET soldier.
Anyway, the video is a nice refresher for all the common-task level technique; it's the same video you can buy for 40$ in the PX.