Yes yes, slings are veryyyyy helpful. I still wear mine everytime I go to an airport and should have been wearing it when taking public trans because I got bumped a few times and it hurt like hell. But now my fam drives me around and they are all aware they need to drive very cautiously when I am in the vehicle. For post surgery, it is a must, because you definitely cannot take ANY risk of people bumping you whatsoever, it also makes people around you naturally more helpful because they can physically see you a disability. But at the same time, your arm may not like that position soon after surgery. I remember after my surgery, I had to wear it for a while, but after a few weeks my arm hated that position and therefore I hated wearing it. Also, I should mention I didn't have a "sling" because it pushes down on your shoulder and is not good for people with TOS. I have an "arm mobilizer" sort of heavy duty, was given to me by my last surgeon and I still use it sometimes. It wraps around your waist and keeps your arm in a similar position a sling would, without the weight of a strap on your shoulder/back/chest.