Excerpt: I bought this as a replacement for my 70-200mm zoom. I used to have a 200mm f2 in the old days and was concerned that I would be disappointed with this lens. Oh, no, it is brilliant and I love it. So crisp and works so well with the extenders.
Pros: Consistent Output, Easily Interchangeable, Fast / accurate auto-focus, Lightweight
Conclusion: This is an exceptional prime lens. The images it produces are outstanding. I also shoot with a 70-200mm II is and I find myself using it more than the zoom lens. It can produce great images hand held but if you can use a tripod or a monopod do so. It's a great lens for the price. If you are shooting action then you should go for the 70-200 mm II is if you are not experienced enough to use a prime lens without image stabilization.
Pros: Fast auto-focus, Superior build quality, Super-sharp images
Summary: What can one really say about one of the best full frame 200mm f/2.8 lenses on the market!? It is excellent! This is an older lens and considerably less expensive than the current version which has all the bells and whistles but I don't really require IS (image stabilization), the nice Canon white color, etc. The optics are what counts and the glass in this lens is excellent! My only minor quibble is the lack of a tripod mount ring; a little cheap but a minor item.
Summary: This is one of Canon's under-appreciated lenses in my opinion. I used to own the 70-200mm IS II and that's a great lens, no doubt. But as I transitioned from a professional photographer to filmmaker I started to collect prime lenses. Doing more run and gun, the 70-200 became too much lens. I wanted to be more discrete and wanted to use a C100 on a monopod without having such a large and hard to stabilize form factor. I purchased this lens and haven't looked back.
Summary: After realizing that I was using my 70-200 2.8L at the 200mm end way more than anyplace else, I decided to make a change to the 200mm 2.8L II lens. As expected for L lenses, it is nice and sharp with quick and silent focus. As an added bonus, this lens is nice and discreet compared to the much larger, white 70-200. The only reason I'd caution against this lens is if you need the flexibily of a zoom lens for your particular use case. For my needs, this is perfect.
Summary: I bought this lens for sports photography based on the stellar reviews. From the first shots I could see the difference and after working with the lens for a few weeks now my photos of high school football games rival the local pros. From the stands this lens won't reach out far enough to get great shots but from the sidelines it will do everything you want. It is fast enough for great shots in low light late in the game.
Conclusion: I bought this one pretty recently but I have to say it's gotten a lot of use. I'm not a big fan of zooms, but I have a few. I was looking at the 70-200 f/2.8L IS II. Very pricey, and it would probably spend most of its time at 200mm. So for 1/3 of the price I get this 200mm f.2.8L II. I think it's actually sharper, and I don't miss the IS much because honestly below 1/200 of a second your subject motion comes into play. Also this lens is quite sharp wide open.
Pros: Fast auto-focus, Superior build quality, Super-sharp images, lightweight for the fl, great value
Summary: I found this is a great lens for sports and wildlife and any situation where you want to get in close and get sharp as a tach photos from a distance. If you use a tripod or monopod you will get very pleasing results. The 2.8 appiture let's in all the light you will need. The price is not cheap but you have to expect to pay more for a quality lens like this. The only thing I would change is that I would make an IS version to control hand held shooting.