I have been using Blueball's designs since I first started with Sandvox 1.xx All I can say about Bluedball designs and about Charlie himself is that he is very quick to respond and as above a solution too. He has helped me with issues in the past that had nothing to do with his product. I have and use most of his designs and support him and Kuler and the Behind the Rabbit designs. They have all made my life easier.
If you want more designs and flexibility for your websites the $10-$15 that is charged for the designs is not going to break anyone's budget....
Just my 2 cents.