I bought the lens to replace the 24-70 L 2.8, because I had some problems with. The 24-105 cuts for my feeling compared to 24-70er in image quality in exactly prepared exposure scenarios a touch worse. But one has less money for a better focal length and in everyday life definitely better pictures (due to IS and less flare in backlit). The build quality is impeccable and justified the price. I have to buy the decision and the 24-105er it again to give back never regretted the 24-70er.
