cannot underestimate the usefulness of this lens. Sure, it's not a zoom lens. However, it "sees" the world in much the same way as your eye does (same magnification), so it's great for simply capturing scenes as they were. But what really stands out is the aperture value. F1.4 is INCREDIBLE. This allows you to use shutter speeds many times faster than cheap “kit” lenses. Even among the “L” series lenses, you won't find a telephoto lens with a better f-number than F2.8, meaning this lens lets you capture images in relatively low light conditions that you simply can't capture with most other lenses (without getting blurry). Also, mount this lens on a tripod and take pictures in almost zero light and you'll be able to see things your own eyes can't capture. I was at the profile location of Mt Rushmore at 3am on a moonless night and couldn't see where the mountain was at all - pure black sky and mountain. I mounted my Rebel XTI on a tripod with this lens and guessed, and there was George Washington. Of course, you can do delayed exposures with other lenses, but this lens will make them faster or produce brighter results than anything but the “L” series F1.2 (if you want to pay double the price). Also, a better f-number usually means better, faster autofocus, so you get more good, clear shots. Finally the books. Check out the sample photos taken with this lens. The blur you can get with it is stunning, especially when you compare it to a cheap lens you may have shot with your camera, like the 18-55mm lens. With this lens, almost anyone can take photos that look like they were taken by a seasoned pro — REALLY! Just get used to how your camera body sets aperture and metering (turn OFF your flash!!), adjust your exposure and ISO settings to get a generous amount of light, and start shooting. You (and your subjects) will be amazed by the results.