I have been working in Google's new beta interface for Adwords and I'm not sure if I like it or not.  Having worked with Google Adwords since 2004 I have seen a lot of changes in their system but this is the first time that they have created a new interface for it. 

The new interface has a much cleaner/newer look and feel to it and it's more analytic and tends to look more now like Google analytics than it does Adwords.  The goal of the new interface is to make it easier for people like me to manage accounts quicker and more effectively as well as for beginners to understand their accounts and use the tool more often.  One of the key features that I like is the keyword search within a campaign feature.  In the past you had to run a search across all of the campaigns and then drill into the ad group to manage the keyword.  Now all you have to do is set up a filter and run your keyword search.  

The data map is much easier to read and figure out so a novice or your executive team can login and see a quick snapshot of your campaign is doing.  I also like the account tree so everything is on the left hand side of the screen and you can even look into your analytics while not having to leave Adwords. 

The new interface seems to be improvement over the old interface, but it will take some time to get used to.  With that in mind remember this, Google is a pay-per-click company the more clicks the better Google does.  A lot of people trust Google for everything including analytics for them to give them the best data, keyword searches etc.  However I leave you with this...if Adwords says it's a click and Google analytics say's it's a click is it a click?