For a full overview it's well worth reading this sticky from the other board Mouse vs. Tablet as you'll get a bigger insight of all the pro's and con's with a tablet. Personally I use mine every day (I use it for my actual job as well as map drawing) and it's the best investment I've made in a long time. They're really easy to use and there's isn't really a learning curve at all, the learning really comes down to knowing how to use Photoshop and not on how to use the tablet... there's really not much to it. It's odd at first and you'll feel like your accuracy with it is pretty bad, but as with anything you'll get the hang of it pretty quickly.