it depends on what you are using the tablet for, if you are drawing directly freehand on a tablet it wont make a difference to your skill and unless you are a serious artist or drawing for print you dont really need the angle detection, high pressure sensitivity and high DPI of more expensive tablets, it would honestly be wasted on a hobbyist. when i got my first tablet a few years ago i got a cheapie A5 for £35 just to see whyat it was like and i once i knew i could work with it i spent more money on my next and so on...
people also seem to forget that you can use a tablet for more than freehand drawing, the biggest strength of a having a tablet is for use with the pen tool (probably the most ueful tool on any graphics software), it makes it so damn intuitive !