I utilize my arm for working out and throwing shot put. So I really like how it allows me to complete certain lifts with both arms, and keeps me balance from my left to right side. Other than that I like how easy it is for me to utilize many attachments for various movements (push, pull and presses). I also like how the Velcro fasteners allow me to adjust my arm to better fit my biceps! Finally I really like the opening where my hand can stick out because I do have my hand, but my forearm is significantly shortened and clubbed.
The fit around my lower arm could be improved, made to fit better and not put too much pressure on my wrist (since my arm is shaped like a club) additionally the leather around my upper arm gets agitated after extended use, which can be fixed by using a sleeve. Something g else that could be improved is the fit while being sweaty as my prosthetic tends to slip downy arm over time
I don’t have a common upper arm amputation, I have radial ray dysplasia. So my arms do have a significant limb length difference, in which a prosthetics is useful in the gym setting. I think would recommend it to others especially those with a similar disability to mine, as it has assisted me in many ways from doing the monkey bars, pull ups, deadlifts etc!