I'll add my anecdotal case. I created a $30 AdWords campaign last month for the first time ($1/day maximum), more as an experiment and for learning than anything. After a few days I received an email from Google asking "How did we do?".
I filled out a form saying I wasn't happy since almost all traffic I was getting was having a 0 second visit time on my site, when the search terms were very specific and matching perfectly with the topic of my web site. It was hard for me to believe that everybody who searched for those terms and click on my add didn't even check any other page so I suspected fraud. A person (it seems; it was signed with a name) answered explaining the situation in a long and informative email, he also ran a fraud report just in case.
So in my case AdWords doesn't seem to work out but I got quick and good support from a person at Google when I'm just spending $30 in a "campaign".
I filled out a form saying I wasn't happy since almost all traffic I was getting was having a 0 second visit time on my site, when the search terms were very specific and matching perfectly with the topic of my web site. It was hard for me to believe that everybody who searched for those terms and click on my add didn't even check any other page so I suspected fraud. A person (it seems; it was signed with a name) answered explaining the situation in a long and informative email, he also ran a fraud report just in case.
So in my case AdWords doesn't seem to work out but I got quick and good support from a person at Google when I'm just spending $30 in a "campaign".