Review for this lens is planned, here are some comments and sample images:
Canon EF 28mm f/1.8 USM is a very nice lens. Reviews says that it is bad at shooting testcharts, but I suppose you are going to take photos. It may be not excellent at shooting test charts, but it has good AF in low light, is reasonably sharp and have very pleasant background drawing. Pictures it produces are not perfect technically, but they have some soul in them. I have Canon EF17-40 f/4.0L USM, and it produces pics that are better technically at apertures from f/5.6 and narrower but it can not shoot f/1.8 or even f/3.5. So I think that this lens is a very good and affordable tool for creative photography. It has some drawbacks however. It struggles in harsh lighting, and is prone to flare.
With the large maximum aperture, excellent background blur is possible even with a fast shutter speed. The aspherical lens element makes the lens compact and corrects spherical aberrations. The image is sharp even at the edges. Lead-free glass is used. – this is a short description from official Canon web site.
Buddist monks in Angkor Wat temple, Cambodia, Canon 300D, f/2.8, 1/80s.
Buddist monk walking through the longest gallery of Angkor Wat temple, Canon 300D, f/2.2, 1/200s.
Man playing flute on the beach, India, Kerala, Canon 40D, f/5.6.
Taj Mahal at sunset, India, Canon 40D, f/8.
Squirrel eating nut. Canon 40D, f/3.2, 1/125s.