I bought this lens mainly because I work in tight areas. I used the lens at f/1.4 or f/1.8 without any IQ/PQ problem. I'm not pixel junkie, I rather care about the image itself. This lens offers beautiful images - sharpness, contrast, bokeh, etc. It offers even considerable depth of field as wide if you have a proper object-background positioning - which I like. I use it on Canon 5D M2.
As any such wide lens, it has perspective distortions. But this is not bad (at all). This is a feature. If you want a perspective compression, you'd go for 135mm f/2 or so. Indeed, this distortion offers new creative opportunities, if you know how to use it. It will give you very different images. If you are not sure of 24mm (or any fixed focal length of a prime lens), I'd recommend to experiment with 24-70mm f/2.8 or 24-105 f/4 lenses - at fixed focal lengths (without zooming). Basically I observe that they offer quite similar image qualities. Yet, this lens is a viable option if you want the f/1.4 fastness.