My son has been using the Jaeger arms bands (including his recommended instructions) for some time to warm up and for post pitching cool down with good results. We have also kept up doing his long toss program as well.
He has a new pitching coach who has helped him with his mechanics. The new coach has said that he is not a fan of the bands as they don't really help that much since they can overload some of the smaller muscles in the shoulder area and consequently the smaller muscles that are prone to being injured do not get the benefit of the work out. We are going to continue to use them and the Jaeger program, but I am curious if there is any truth to his comments?
We have used the Jaeger bands for several years. Just looking at the pictures the Ace bands appear to be identical.
We have gotten good service out of the Jaeger bands. But neither they nor the Ace bands are any sort of earthshattering development. You can make your own with some surgical tubing and a fence clip or carabiner.
The exercises that Jaeger recommends appear to be derived from and/or expansions on the original Jobe exercises. The same is true of the Throwers Ten and exercises recommened in the ASMI booklet. I suspect the exercises that Ace recommends are similar. But I would be interested in seeing them to see if they have come up with any new uses for the bands.
In short, there's nothing special about the bands. The key is how you use them.