As I said previously, it's like wines: the difference you have to pay to get from good to fantastic is huge. Maybe SA does not add much to your player but I think it adds something. Is it worth the price ? Difficult to be sure. You may find obvious examples of failures (I had a PK specialist who missed 4 out of 5 and I never gave him the chance to have another attempt). But I had also FK specialists who were goal machines. Was it due to the SA, who knows ?