Price-performance ratio very good. Fits for Sony full-frame.

I use the 105s Macro from Sigma in conjunction with the Sony Alpha 900. The image quality is very good, especially the Alpha 900 is equipped with a full-frame sensor. Especially the price is also a lucrative business. Where else can you get such a good lens for now well below 500 euros. Of course, there are always discussions about the speed of autofocus. But at the macro photography is m. E. rather tripod, remote shutter or Selbsauslöser, Manual Focus, mirror lock and much time and Muse in the foreground.
From me there is certainly a clear buy recommendation.