I am an instant fan of this extension. I waiver about which one to buy and I finally selected ccInvoice. I am very pleased that I made the choice to purchase this extension. I have the entire system up and running in short time. I have not had the need to call for any support as of yet but I am going to make a few suggestions that I think will put this over the top for most. I own a small web development company and we need a straight forward way to give local business owners an easy why to write quote and send invoices. This did the trick!