ok, well, I've only ever used intuos3, but they both work similarly.
From what I know of it, it's perfectly fine for drawing. Hell, I've used a crap tablet back in the days of
windows95 that was pretty much a less clunky mouse and it was fine. (dunno what happened to it, I'd like it
back)
A tablet is a glorified mouse, pretty much.
Basically, each part of the tablet area corresponds to a part of the screen. (so if you move the pen to the right corner
of the tablet, the mouse cursor will jump to the right corner of the screen) If you got that down, then it's like
using a regular pen.
In Photoshop, you can control opacity and size with the pen pressure. I haven't used tablet with photoshop
extensively so I don't know much more. And like Maple Rose in the other thread, I prefer mouse for
vectoring.
Here's a comprehensive PS painting tutorial, and there's a section on tablets:
http://www.admemento.com/tutorials/PS-Basics/index.htm
tablet section:
http://www.admemento.com/tutorials/PS-Basics/files/PS_tablet01.htm
http://www.admemento.com/tutorials/PS-Basics/files/PS_tablet02.htm
on another note, if you download openCanvas1.1 (google oc11b72.exe) I prefer that to PS for painting, as it responds
much much better to tablets. (but PS is much friendlier to mouse and editing and cropping.... and stuff.)