This product is exceptional for the price. Sturdy metal constructioon with solid glass. Both the macro and wide-angle attachments produce very good results. No, they will not produce the same quality results of a $400 lens, as well it shouldn't. The majority of negative reviews of this product appear to be due to either grandiose expectations or a lack of knowledge. Yes, this lens can and will produce vignetting and other distortons under certain conditions, but so will a $600 lens. It may also jam up and damage the thread on your camera if you forcefully screw it on sideways, but so will a $600 lens. And, finally, no it will not produce Ansel Adams' quality landscapes... Unless you are Ansel. For the price, however, it will provide good photographs for good photographers.