I'am so surprised when The-digital-picture.com just rated 4/5 star for Canon EF 50mm f/1.8 II . This lens deserves much more than 4/5 star.
I have purchased this lens. It has amazing image quality compare to its very low cost. It's also pretty fast. Most camera stores in my city say Canon EF 50mm f/1.8 II's one of their best selling lenses.