This lens belongs to my favourites: "standard", but 58mm is much better for portraits; sharp and contrasty at least from f/2; flat field; high resistance to flare.
Minus: some LoCA; strong sharpness drop at short distances (stopping down required); coma (OK only from f/2.
Above all, manufacturing quality, size, and handling make it a joy to use.
I agree with Benveniste's remarks regarding correction of spherical aberrations. On certain subjects, this requires post-processing. Not as bas as Sigma 35/1.4 though.
Above examples demonstrate some of this.
Concerning the hood, I screwed on a short, generic, metallic one, designed for 35mm lenses. I use it as a front lens (mechanical) protection - a bumper. Never felt the need for filters or longer hoods.