I own a Canon AE-1 and I have recently purchased a Canon EOS M. This adaptor allowed me to successfully use the old lenses on the new camera. Build quality is very good with a very pleasant black matt finish. I am not an expert to judge focus accuracy, but I am very pleased with the results, including when focused to infinity. Fit is tight both on the camera and on the lens. Very pleased about the value I got from this adapter!!! Ebay is flooded with FD mount lenses!
I have purchased this product to charge my compact camera battery. This charger works great, and offers great flexibility as it can charge most gadget batteries. I am also using this to charge my smartphone battery. Adaptors useful when travelling. Excellent product.