What do you think about 1 button blazers? - Page 4
A lot of guys on Savile Row make one button suits. The proportion is very important, and the button should be at the waist line. I like the look a lot if it's done right.
Side note: I like one button suits best when the trousers come up to, or near the waist line. I think the proportion doesn't work if worn with low rise trousers. A one button jacket is a traditional style, popularized when people wore higher trousers.