I have a Cintiq 12 ux here at home and it doesn’t have the sensitivity of the bigger 21" I had with my previous employer. It does work well for I use it for and the price was pretty good. I may look for a used 21" this year and try to sell the 12". The freelance work I have done with it has paid for it 2 or 3x over.
Now I have a retina iPad and i want to try to use it as a sketch pad.