The easiest, most effective way to replace urls in the wordpress database.
I had two sites cloned and the base url did not update. The plugin helped me change 2300 urls in less than 10 mins.
This plugin finds URLs so that's great but it doesn't make a difference between directories, for example:
http://www.domain.com/ will be found but this:
http://www.domain.com/test/ is ignored (no different then the basic URL)
So when you want to transfer a WP installation from /test/ to the root or to another directory within the root this is not the plugin you can use, and that's a missed chance i.m.o..