I use a Wacom Graphire at work (on a Mac, but must be the same on Windows). It have two devices: a mousse and a pen. The mousse device are good, but there's no reason to use it, the optical devices are better. The pen are very good, and their sensibility are excellent.
But this table have two problems: if you use this table any day, do you need to clean at least 2 times at week the surface of the table, because it comes dirty frequently. The other is the size of the surface: it's DINA6; this is a very small size for work, specially if you wish to paint!
For painting, the table are good. Do you need to get used, and somtimes are hard. If you need a higher table, their price are too much higher! I use this A6 table that is small, because the original Mac mices have only one button, and this is very uncomfortable.
I tested other marks of graphic tables, a part of Wacom, and the only good tables are Wacom again, and Genius. Don't purchase unknow marks, or graphic tables connected at serial/com ports, it must be at least USB for the flux of data (deep and pressure) necessary to work correctly. Note: i never used a graphic table to make any skin/wallpaper