Welcome to WebmasterWorld Guest from 220.127.116.11
Forum Moderators: werty
I know it's also come up recently on seobook.com. Aaron and Giovanna seem to think it's great.
I wish I could offer something from personal experience. Sorry.
The metrics you can get are very cool. It is quickly becoming my keyword research tool of choice. There aren't many tools where you can get the type of information you get from the add-in (actual ppc values, historical average CTRs, etc.).