Here is what they look like. It includes a chart for each band and then combination of bands, so you can get various weights out of it. Here's my mini-review on it.
STRENGTH - I find it best for building strength and stamina/endurance, and use it in the same way Brady Ellison does his post-shooting exercises. This is done like 'HOLD for 5-seconds" and then "Rest for 2X, twice that or 10-seconds". Repeat, but extend your Hold every time, adding 3 to 5- sconds each time, but don't forget to Rest for 'twice' as long, e.g., Hold for 10 - Rest for 20, then Hold for 15 - Rest for 30.
You get the idea ...
FORM - To me, it is NOT the archery tool to use for form. What is best if those 3 to 4-packs of rubber exercise bands that are roughly 2-1/2" wide by almost 12" long. I wear a glove on the bow hand, so when I practice my release and let the band go ... it doesn't snap and 'sting' my hand ... yeah, sensitive skin, haha!
The lighter pull bands don't hurt you but the heavier ones WILL leave a mark ...ask me how I know?
As a bonus, you can practice your entire shot cycle, less loading the bow of course, using these bands. I find the practice looking straight into the mirror to check/confirm my alignment to work really well. Between these trainers and religiously watching AND practicing back engagement and the shot cycle as taught by Tom Klum, Jim Ploen and Clay Hayes (all on You Tube) and my traditional archery performance is really taking off!
For instance, at my weekly indoor league, even the scorers and the other shooters have noticed that I now have little to no variation in windage, as in arrows hitting to the left or right of what I'm aiming at (indoor animal target league). We shoot 3 arrows at each distance AND position, and then move for the other 3. Each set is also shot from a different position; standing, standing 180-faced away, from 1 knee, 2 knees, etc. , just to break it up.
I am still learning this latest/newest-to-me bow, and most importantly the trajectory thereof, but that will come in ... after many more arrows are shot, LOL! Now I am by far not the best archer there, but I see see this training on FORM and execution paying off to the point that I firmly believe that in the long run I'll be giving the top archer a run for the top spot!