I keep recommending this guy to artist/designer types looking into viable alternatives to Wacom drawing tablets. Not only is Frenden a prolific designer and illustrator, but he has accumulated an impressively extensive set of drawing tablet reviews. His analysis is informed by his practical experience and use of the devices in real-world productions scenarios. He makes a lot of art.
Anyway, Frenden is a great starting point to get your head around offerings like the Wacom Companion and Microsoft's Surface collection. I'm really looking forward to his take on iPad Pro and the Apple Pencil.