This used to be my main lens, before getting the 24-120mm. I have taken most of my portfolio pieces using this lense.
I tend to do a lot of travel photography and hiking. So I have opted for something more versatile and lightweight to travel with. I find if i shoot at 24mm I get the sharpest photos with an aperture overall is either f/5.6 or f/8, which is pretty good for landscapes.