wish I'd checked this thread before buying this thing, but it was only 80 quid from cash converters so I don't have much buyers remorse.
It's still alright to draw on if keep my hand in one position, but any angle that isn't the same as the one I calibrated it at is just way off (made a webm to show what I'm talking about)
Maybe I'll get used to it after a while but all it's done is make me want to shell out for something that's actually fucking accurate.