It works great ... Very simple ... Looks simple and classy. Had it up and running in five minutes. I spent more time trying to find my flickr username on flickr then I saw the extension documentation that shows it very clearly. Clcik on the set you want to embed - look up at the http address (http://www.flickr.com/photos/thisisyouruserid/sets/thisisyouralbumid)
I'm reviewing because I was apprehensive about downloading with no reviews ... Bet you will love it too.