Found these reviews of Sigma 70mm Art macro.
https://www.ephotozine.com/article/sigma-70mm-f-2-8-dg-macro-art-review-32368
https://petapixel.com/2018/05/30/review-the-sigma-70mm-f-2-8-art-is-a-macro-lens-worthy-of-your-bag/
https://www.ephotozine.com/article/sigma-70mm-f-2-8-dg-macro-art-review-32368
https://petapixel.com/2018/05/30/review-the-sigma-70mm-f-2-8-art-is-a-macro-lens-worthy-of-your-bag/