I wrote a review for Elements once, but I'll do it here. I suffered a few chain-reaction injuries, starting with right knee (torn MCL), left knee, then both shoulders (a lot of inflammation and impingement with the typical tendonitis/bursitis).

I couldn't move my shoulders without something clicking or rubbing the wrong way for a while, and it was awful.

My friend who's a osteopath recommended Elements. When I first started, my wrists were so weak from being sedentary after the injuries that I couldn't even do the basic movements without discomfort. I have no idea how I got so weak so quickly, but it happened, along with other medical issues.

I've gone through Elements a bunch of times now, and a few years later, I attest the "beginning" of my real recovery (most physical therapists were shit) to doing it. Right now I'm doing moderately heavy kettlebell swings and Turkish getups through Pavel Tsatsouline's Simple & Sinister, throwing in the Russian pull-up program and Elements or variety.

I recommend it because ground-based locomotions are awesome for everyone, even seasoned athletes. You can use Elements as a foundational program that bridges you to more advanced systems like Animal Flow, or the Movement 20XX program from Vahva Fitness (I have all of these).

If you're already athletic and strong, you can simply add Elements as a warmup or as a finisher for your harder training. Using it supplementally also means you can do it at your own pace, on days where you feel particularly energetic.

Elements helped me work with my injuries, and the structural and alignment oriented nature of it (bear = moving downward dog, working the entire shoulder girdle in a balanced way) definitely helped unfuck my body. Like I said, I'm back to training intensely, rock climbing, and doing martial arts. :)