There are different types of raw diets. I feed my dogs the recipe our veterinarian made. It consists of meat (usually chicken necks or backs), shredded vegetables, organ meat, fish (I do tuna) or raw egg, alfafa powder and a few other vitamins.
My dogs go crazy when I bring out the food, and are always ready to go, but I don't really remember what they were like "before". It does do a lot for the looks though. Silky coats, shining eyes, etc.
Raw diets are not for everyone or every dog--while they may be great for dogs with allergies etc., they are NOT great for every dog out there. They are also hard to prepare (you have to make sure you have everything, etc.) and sometimes expensive (though they are usually cheaper than kibble, if you have multiple or very large dogs, it could be rather expensive). I recommend reading Food Pets Die For by Ann N. Martin. Great book. If you have any questions, feel free to PM me.