After dropping my beloved 24-105 and denting the filter ring, I gave it away and bought this lens. No regrets. I was happy with the former lens, but if one is deciding between the two this one is the way to go. It has better stabilization, less barrel distortion at 24mm, and a macro mode that is much more useful than most forum members credit. I got it just in time for last weeks trip to the coastal redwoods of northern California. Here is one example, edited in Photoshop Elements and Nik Color Efex.