I use PRWeb mainly to distribute my PRs.. it's very good for backlinks and traffic. And great for exposure..
I know one person in particular that I've worked with that got one of hers' picked up by her local media.. and got an interview that was posted in a high distribution offline newspaper.
Like all things it's going to depend on how well it's done, how it's pitched, the saturation, what you are competing against.. and if there is interest and demand for what you are doing.
It plays a roll in my overall marketing strategy..

:wink: