I'm trying to sell some products off Amazon's store on a blog, do you think it would be best to directly use their description, or to spin the paragraph slightly. Like this big red bike is dirty to this massive red bike is muddy.
I would suggest either 1) use their descriptions and deal w/ the slight reduction in rankings for duplicate content by compensating w/ better link building or 2) write your own original descriptions from scratch. Google can detect even partial duplicates. They have patents on a process for doing so.