Each to their own. After using an MS Tablet to try and take notes, I wouldn't buy one for that reason. I cannot point out exactly what is wrong with taking notes on a tablet, but it certainly isn't as good as paper or a whiteboard.
Best use of a tablet I've seen, is a laptop that just "happened" to be a tablet too, meaning you can lift the screen off. Great if you need to show someone something or just want to watch a movie.