It is near perfection.

The EOS 600D is a very effective case very good compromise between the 500D and 7D which it shares common characteristics.
The image quality is almost perfect and an amateur will not know the difference between a picture taken by a professional case and this one.
Ergonomics are good, and the aspect of "plastic" of the case is offset by the solid feel it releases.
Personally I hesitated with the Nikon D5100 as the latter has all a bunch of creative filter that I will enjoy it find 600D side of the coin, the 600D takes better photo quality than the Nikon despite the fact sensor that are less "sophisticated" with less "raw power". So the choice is made according to the utility (for me especially it comes to print photos in large A2 format). My choice was therefore turned to the 600D and I'm not disappointed. Congratulations Canon