Admittedly I used this camera for something it is not intended for...Sports shooting. The biggest problem for me was that it shot about 1.5 fps for only 3-4 shots, then goes to less than 1 frame per second. It has a super slow startup time and takes awhile for your shot to show up on the image review. Its slow enough to be a problem in studio shooting, which was my second use for it.
The stubby bottom of the camera makes the vertical grip basically useless, especially with any telephoto lens. This camera just annoyed me for several months, I'm much happier with my Canon 20D, plus its only half the price.