Using a teblet with AutoCAD and 3D MAX

I was looking at this website and they have a nice cheap tablet for about
£60 here
reason I haven't considered a tablet before is because the small ones
seem expensive to me but this one is a descent size and the pen is wireless.
What I would like to know is how well a tablet like this would intergrate
with AutoCAD and 3d Max? Is it easy to get used to? anyone here used one and
thought they were the worst thing ever?
BTW if you are in UK they have a nice cheap wireless keyboard and mouse here
I think looks really good and for £15 you can't go wrong (well I hope
not as I will be getting one :-)
Thanks for any input
Shiva