So I had a few weeks with the Cintiq and here are my comments about it.
Lets start with the Cons:
-Yeah it's bloody expensive, unless your a professional you probably shouldn't even think about it. Even I had a time justifying the price tag.
-Pen to Cursor lag. Yeah it's there but after the 2 weeks you get used to it, and your back to being just as accurate with a regular tablet. (along with people nagging on the thickness of the plexiglass to the lcd.)
-The right hand corners are useless / cursor jitters, there is about 5-10 pixel border you cannot cross, the left hand corners work but jitters. not a big issue, I use the mouse if somet