We no longer have our Wacom products and we had only one disappointment with intuos 4M which was fairly quickly a fault dead horizontal area. The tablet was exchanged against a Touch 5M. What you ask for. P
Returning to the Cintiq 13HD:
The tablet is extremely lightweight and is quite portable (weight and size very similar to a 5M)
The undeniable advantage of cintiq is what saves time and quiescence of our precious brain that no longer correct the stylus according to what we see on the screen. It's like "really" draw on a digital medium.
The screen is also very relaxing for the sight compared to the IMAC 24 calibrated with a spyder. (Personal opinion)
The cable is it true a little heavy (short I do not think, generally the screen or laptop are never at the other end of the desktop). Now we can more easily lose and we never forget one like this could happen. P
In the drawing, 22 or 24 may be a better choice if the portfolio may follow, but for setting color and graphics, this format is perfect as very close to an A4 sheet.
A doubt only on the adjustable foot strength, but we'll see over time. ;)
Good day