Summary: Okay first lets say the mac daddy is the 70-200n 2.8. But if you have less money than some. This len is not going to let you down. Its sharp and detailed through out. Yes its better at 15 to 30 feet. But every lens has a sweet spot. This len is in my bag no matter what or where Im going.
Excerpt: For the first few months after buying my Canon Rebel T3i DSLR, I only used the included lens kit (18-55mm). I am so glad that I spent the extra money to get this lens with the image stabilization as carrying around a tripod to get certain shots is inconvenient. I took shots at a friends wedding with this lens, and the pictures were stunning. This lens however is heavy and feels fragile.
Pros: Consistent Output, Fast / accurate auto-focus
Excerpt: I purchased this to use with my EOS 5D for primarily landscapes. Pictures have come out crisp and clear. Focus is fast. May not be a L series lens, but it is not nearly a "L" price. Nice quality and a good value.