WordPress.org

Why this plugin is useful for users of your blog?

It's useful because they can easily check what themes you writing for, and this way they could find the desired article more easily.

Is it possible to use it with non standart search like Google Custom Search Engine or similar?

Well, depends. Current version (1.1.2) reqires the name of the input field to be "s", so if your search field has such name, there is no problem at all.

Is it heavy for my blog?

No, it selecting results from two joined tables, and it is not heavy at all.

Is it secure?

Thank you for that question :). Actually it's escaping the search string with functions provided from Wordpress, so if you find Wordpress secure, means that the plugin is secure as well.

Use Contact the author for suport and other questions. Thanks!