I used to sell tablets with my workstations many years ago, they were I think around £500 in the early 90s. We had some experience with the first cordless, but static was a problem.
I'm surprised by the size of the units being mentioned on this thread. At a guess, the pro tablets then were about 18" diagonally, however, most of this space was taken up with a command menu, which is, or should be, supplied by the software house in the form of an overlay in hard plastic. This covered dozens of commands and was fully programmable to one's own modifications.
The drawing area I seem to recall, is not much more than 4 inches across, and the ratio of the screen. (In CRT days)
You may find that your arm movements are increased but the wrist movement slightly less with this layout.
The puck used to have a pair of cross-hairs in a clear ring, and as many as a dozen buttons for regular commands. The commands would be annunciated on a second screen, so as not to intrude on the main drawing display area. With the advent of better screens, I expect that this will not be the case anymore.
We would also offer a pen type puck, with two buttons. It made a nice change, but was not really considered a professional tool.
I used to give some hours of training with each system, but usually, after some weeks of my customers having this kit, they would be working at blinding speeds, so fast that I couldn't keep up with the drawing, let alone the input movements.