That's good, but a good CPC or even CTR doesn't mean much to me because once you have this sorted out, what is important is how much traffic you can bring to your pages. Because that's what count at the end of the day. I don't care if I have a $10 eCPM and can only get 50 visitors per day on my site.. I prefer to have a lower eCPM but tons of visitors each and every day.