I think thats a good question and depends on the person. I personally do not see it as a sin but like anything else, used in excess or abused it would be sinful. For example, I do not see drinking as sinful but I see being a drunk as sinful. I view gear the same way. If you are using it to cheat in a sport, well that would cuase one to question their conscience. I feel comfortable in my use and believe it betters me, allows me to harness my potential but thats me. How about you? Curoius as to your thoughts.