I have a couple of tablets kicking around from when I worked as a commercial illustrator/art director. Honestly, I find them to be tricky and awful to use, but they definitely have their place. If I can use a mouse instead, I do so. They are really not a suitable replacement for a pointing device, just useful for drawing stuff and for things that require pressure sensitivity. I have the wacom mouse and I never use it, so don't waste your money on that.
Also, those of you who are dinosaurs like me and are on CRT monitors, have fun with the dancing cursor! My triple 22" Mitsu rig irradiates my tablet if you get anywhere near them and makes the cursor go bonkers.