I have a Wacom Intuos and I really like it even though I'm not much of an illustrator. A tablet is great for graphic work but totally useless for video editing-- sometimes it can be really difficult to make exact selections/measurements/cuts if you're not used to it.
The learning curve is a little frustrating but if you can get over it there are some definite advantages, such as a faster workflow than working with a mouse. Usually there are programmable buttons on the tablet itself which allow for better control of your document, not to mention that the pen/tablet is usually pressure sensitive so it's easy to create a unique mark. There are plenty of other advantages you could probably find with a google search, but one of my favorite is an intangible "connection" with the artwork. It just feels artsy and that always helps.
In a rare case, my friend was born ambidextrous and can use the tablet with one hand and the mouse with the other. He fucking FLIES through graphic work and its crazy to see.
Hope this helps!