This brush is amazing. I purchased this at Sephora, specifically because it was the BCA  model.  It comes with the sensitive brush head which I think is a good  starter brush,  after 90 days I replaced it with the normal brush head.  *I now replace my brush head every 70 days - I think 90 is too long, I  feel the brush start to soften, like when you need to change your  toothbrush       My skin was visibly cleaner after the first use.   It was super soft and smooth, there wasn't a trace of makeup or  residue of SPF lingering.   When I used my moisturizer, I noticed a  completely different feel - it actually melted into my skin, not just  sitting on top.    
Navigating the dirty world of Clean Beauty buzzwords and overpriced Yoga props.