i think its a great idea to test your add through adwords. like yellow pages ad for example. it would cost you a couple of thousands for a yellow pages ad, why not use adwords to test it first? Also to see what would work as description and keywords for your site, adwords would provide those stats after spending a couple of hundred bucks. just wanted to share this with you, in case you are not doing it yet
I believe this is a hidden gem of AdWords along with Keyword research for SEO. The only thing to be careful of is the different media, audience etc. What works in AdWords may not work in the yellow pages but a great starting point