The quality is very high for what it is - a tablet keyboard accessory. I've owned lots of these over the years, from multiple Microsoft Surface keyboards, to a variety of first and third party accessories for various iPads. This is the best of the lot, by far. For that reason alone it makes it worthwhile to me - because there is nothing else on the market with this combination of features - at any price.
The keyboard is excellent - lots of people saying it's as good or better than current Macbook keyboards. It's still not quite as good as my Thinkpad keyboard - but excellent nonetheless. The trackpad is extremely responsive and accurate, and though it is a hinged mechanism, Apple has managed to do what no PC maker has done - ever - and make it clickable at all 4 corners. The main issue is the activation pressure is a bit too high. I use tap to click, although not every mouse action is compatible - sometimes you must click.
Main complaint seems to be the material it is covered in - I understand both sides of this issue. My Smart Keyboard Folio held up well enough - certainly better than if they'd used real leather. It would be nice, however if it felt a bit less rubbery and a bit more premium.