Summary: I bought the 50d as a backup camera to my 5d MkII. It is an outstanding camera that truly comes in extremely close to the 5d in performance and features, at a fraction of the cost. I've used it on a shoot as a second camera (in lieu of changing lenses on my primary) and found that I really couldn't tell which camera had taken the pictures without checking the metadata.
Summary: I bought this one used for sports and got good use out of it for all of two month. I'm a novice having only recently upgraded from an S100 to this DSLR but the controls were easy to navigate. I had a harder time migrating from the 50D to the 70D (and 7D) than when I first got the 50D. All was well until I made the mistake of putting a can of creme soda in my bag which ruptured.
Summary: I am sorta joking about the title, but really, this has so many features I thought were only available on a 5D mkII! Silent Shutter Ultra-high FPS (With Magic Lantern) Video Recording Very clean ISO performance. (Can go up to ISO 3200 before noise becomes REALLY apparent, I shoot at ISO 800 most of the time!) Live View Gigantic, beautiful screen (Of course, I upgraded from the 20D...) All in all, I HIGHLY recommend this camera.
Summary: As for an advanced amateur photografer, this camera offers great opportunities. Camera limits me in no way. It requires good lens to show great pictures. Body feels so strong and durable, lays perfect inmy hand. It's very fast in operating. Slight disadvantage is known noise level of the sensor. But if kept in mind, it won't bother you. There are much newer cameras on the market now. I tried 60d. Great camera, but feels less sturdy and pro than mine.
Summary: The pros and cons of this camera have already been reported on very nicely by other reviewers - this short video tutorial is going to outline the process of installing Magic Lantern on your 50D, as well as show off the added video capabilities! Sorry for the lackluster video footage - as soon as I went outside it started to rain so I couldn't get anything very interesting!
Summary: I have done everything to this camera that I thought would break it by now. I dropped it in a camp fire, put it in the snow to take a picture, did photography in sandstorms and blizzards, packed it tight into a hiking bag. On a road trip this camera once fell on to the ground lens first. The lens was completely broken but the body is still in perfect shape and continues to amaze everyone with the amazing photos this thing puts out.
Summary: This camera was and still is one of my favorite DSLR's I have ever owned. This thing is tough as nails, takes stunning photos, and works like a charm. I've shot everything from macro to landscapes with this camera and I must say I love this body. It's faster than my MK2 and supports more gear than my older rebel. I still use it along side my newer cameras, it's still a fantastic body with great capability.
Excerpt: If you don't need video.. this is the one to buy. I find there is noise in the 40d and the 20d/30d/ image is almost perfect but with a slow buffer in the camers. 50d - shoot models as fast as you want at full raw - camera keeps up. I recommend it. I have two. Problems: Buy a larger - and faster CF card.