I don't know, if Ipad is good or not.
I have a great XPPen 15.6 Pro at my working desk but wanted a portable drawing tab too, so I stood before the decision as you and took a little research, since I didn't want to spend too much money on sth that maybe doesn't fit my needs.
So I decided to buy the XPPen magic drawing Pad.
I don't know if I should like, or hate it XD The working with it is smooth, the display has per se a paperlike feeling (for real!) but it surely is much smaller than my big drawing pad at my desk. But it struggles with big resolution data which I choose, since I want to print someday my comic. If its really just web based and just 300 dpi instead of 600 it should be fine. You can also lean your hand on the display. It's still enough space to draw properly. Don't know, if the Ipad is bigger or smaller. If it is smaller I totally wouldnt recommend, when you enjoy big working spaces.