It's a little unfortunate that the iPad Air (at least the first one) is really inexact for pressure-sensitive drawing, though. It tends to reject or miss the very first part of fast, light strokes. It only recognizes them properly when you start out rather deliberately, counter to how you might sketch or crosshatch.
While nobody has officially confirmed last I looked, best guess seems to have been this is an accidental touch rejection heuristic in the touch drivers to compensate for your hand overlapping the thin bezel when you hold the tablet. That was borne out by the fact that if you first touch the screen elsewhere, the strokes register immediately and correctly as part of a multitouch.
This has, unfortunately, seriously damaged the usefulness of my Wacom Intuos Creative iPad stylus. I've seen the same complaint leveled at other styluses too. I can't see how it wouldn't hit this solution as well.
That said, I'll definitely check this out. I've always wanted a Cintiq but couldn't justify the cost as a hobbyist. If Apple has allowed or will allow the rejection behavior to be disabled by drawing programs, this would be a slam dunk for me.
The Cintiq is a nearly natural pen and paper experience, but if I'm on the go, the Jot Touch 4 + AstroPad has worked out well.
I'm often on the go, and don't do enough Photoshop work to justify lugging around a dedicated wacom. And even if I did it wouldn't have screen, let alone a gorgeous one like on the iPad!
Astropad is working great for me so far. Now time to invest in a pressure sensitive pen.
We've been working on this for 1.5 years and we had to write completely custom tech to make it happen.
We're happy to answer any questions about our tech
How do you keep arbitrary Mac apps in sync with the iPad display?