Free or paid press release?

There are many press release web sites that people can submit their press releases to promote their web sites, some of these services are free and some are paid services, Which one is good? Thanks!

Care to share some good paid press release sites?

I use because for something free you do have a lot of flexibility to have your press release appear presentable with a nice picture and a few url links. And the best part is you can easily get a lot of views really fast.