The Rokinon is manual aperture and manual focus which isn't always the best. Working with autofocus often makes taking images quicker and easier.
Another option is this
Canon 24mm f/2.8 STM for $150. Not sure about the quality or durability but it is pretty cheap.
The other option I know about is a Canon 28mm f/1.8 USM
that's a few years old. However it's right at $500.
Hope that helps!