Book promotion services and softwares really work?

This is the service list I found so far.

Let me know if you have ever used from the list.

Also, let us share if you have any good experience with anybody else.

Thank you.

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* Make Your eBook A Kindle Bestseller: http://www.akelite.com
- Author of HOW TO MAKE TWO HUNDRED A DAY USING TWITTER. Support Indie Authors!

* John Kremer – Book marketing is what I do. I teach people how to market their ebooks/books, both online and off. Promote your books:http://bookmarketingbestsellers.com

* Indie Author News – http://www.indieauthornews.com/

* The Independent Author Network - http://www.independentauthornetwork.com/

* Author Alliance – http://www.author-alliance.com/

* BookTweetingService.com - http://www.booktweetingservice.com/

* Book Cover Ad - http://eatsleepwrite.net/

* Media Exposure Marketing - http://www.electrapublicity.com/

* Joey Pinkney – Author Interviews and Book Reviews. Author/Book Promo Packages –http://joeypinkney.com/ (joey.pinkney@gmail.com)