S2 a worthless purchase for Masters athletes

I've used this scale for three years, diligently trying to track body fat, muscle volume and overall weight. It gets weight right, but that's about it. Whatever algorithm Garmin uses on this scale might as well be just random statistical noise. The Body fat, muscle and bone density tracking are completely inaccurate. I have wasted three years of body composition work because I trusted this scale to tell me what is going on. Garmin's product managers ought to be ashamed of ever going to market with this piece of junk.