It is however, a great completement to your APS-C stills or video kit if you don’t need ultra wide angle very often. If you do, there are better and more expensive options out there.
What "better and more expensive options" are there in the 10-18 range, on an APS-C?
(not trying to trip Northlight up, just genuinely interested)
The 10-18 STM appears to be better than the Canon 10-22mm - at least on paper
Sigma 10-20mm options perhaps?
What options are there around this range? (that isn't a fisheye)
Apart from third party options, the Canon EF-S 10-22 f/3.5-4.5 USM is better built (metal mount, ultrasonic motor), slightly faster and longer. Of course the 10-18 STM has IS, which the 10-22 lacks. I would say that whilst image stabilisation is a really nice feature, even in a wide angle lens, optical performance would override all of these in my decision (not that either of these lenses would fit my camera!). I have a suspicion that the 10-22 might be slightly superior in the corners, but we'll have to wait for Photozone, TDP or Lensrentals (etc.) more formal tests to establish this...