I own and use a Ugee 1910b, and like it, thought it is somewhat sensitive to a few known issues:
1) The drivers require the printed install protocol to be meticulously followed.
2) Support is about what can be expected from a Chinese company.
3) Requires regular calibration. I do so every month to prevent errors.
4) Does not support HDMI. VGA input only.
5) When applying too much pressure the pen will sometimes squeak.
6) No hotkeys on the monitor.
What I love about my tablet, the short form:
1) Drawing is effortless after calibration.
2) No hand-eye coordination issues.
3) Actually came with 2 pens. (The new ones don't require batteries, which is nice, but I cannot personally vouch for their reliability.)
3) After an initial installation issue, it has been trouble free.
4) I have not had to replace any nibs as the screen has absolutely no texture. (It's weird at first.)
Wacom Cintiq is a much better tablet, but alas, even used is worth more than my wife's Honda.
The only thing I really don't like about the Wacom is that replacement nibs for the pen are necessary because of the texture of the surface. It feels great, just like paper, but I'll wear down a nib in a matter of weeks.
You'll have to invest in software to do animation. Smith Micro makes a platform. I own it. Haven't played with it. I can't say much about animation as a whole, though I'm sure someone else can address that area.