Yes I've been working a long time with its predecessor and was almost always happy with my pictures. After the 70-200 2.8 II came to the house, I had the 24-70 2.8 Always dust before I could use it. I'm sure the balance is restored. A worthy successor to the real fun starts. More in every way and had enough. A little more focus, a little more light, a little more feel and a little less weight. A sharpness and brilliance as I knew it only by some FB 70-200 and the 2.8 II. The 5D III giert formally for high resolution objectives, making it really well served. My purse is not always filled to the brim and yet the unreasonableness won again and was rewarded. The low weight loss I feel very comfortable. The Geli is now super easy to use and beautiful snaps. No hakliges back and forth as its predecessor. A stabilizer as it is installed at the competitors I have never missed and I'll never miss. Chill the lens is sharper than its predecessor at 4.0 even at maximum aperture. A great success of Canon. Thanks for that .....