I received mine by UPS on June 29th. I sent it back to the distributor on July 1st. The OS was not functional and the resolution was horrible. I did ask for a replacement rather than my money back. My fingers are crossed. I really want a macro lens of this focal length, or longer, that has image stabilization and is somewhat weather sealed. Sigma's old 150mm is the lens I used most often with my Canon 5D and 7D cameras. I never used the lens indoors. It was always outside in the elements, so I had to send it in to get dust removed. Now, I am wishing I had kept that lens. Instead, I am hoping that the new model will live up to the quality of the old one.