Works good for me.
Works exactly as stated. Other plugins I tried didn't specifically search the Codex, or would turn up misleading forum threads or results from the 'extend' section of WordPress instead. I spend a big chunk of time in the Codex, but don't always want to keep a tab open for it. This is a huge time saver, thank you!
I really enjoyed this add-on as it very handy to lookup the Wordpress Codex database. I just type in the subject I want and it comes back with the information as it would if I had gone to the search option on the Wordpress' own site. Very, very handy.