I've been wanting a Cintiq for a while now and my husband bought one for me after getting our tax refund.
I got the 12wx, which is big enough for me... at the moment. I like that I can draw on the screen, and I'm not using alot of pressure on it as I did with my Graphire so the 1028 pressure is fine with me.
My only problem I had with it was that sometimes the drivers don't load up and I have to open up my Services program and restart the TabletPen drivers for it to work. Of course I had an old computer back then.
I personally like the Cintiq, considering that I can't go out and buy art supplies like I use to, but the Cintiq is not really for everyone.
As viisi said, try before you buy it. If you like how it handles and you're comfortable with it, then it'd be worth investing money into it.
There's two ends to a pencil. Use them both. ~~some artist.