<p>I have had my 24-105 since 2008. It has been on my 40D, my 7D and now on my 5Diii. It is the lens I always have with me, except when photographing birds and wildlife. I find the pictures sharp, focusing fast, the colors exceptional and the lens has been very reliable. The constant f4 is also a great benefit. I use a 16-35 for wide angle, and it is an amazing and wonderful lens for certain things, but it never gives me the reach and versatility I really want for a lens that fulfills multiple and different uses. I have several other L lenses, but the 24-105 is the one lens that is always in the kit with me. I do not think you can go wrong on that choice.</p>