Last week I purchased this component and the support is amazing! I couldn't figure out how to get the login button to work correct in a pop-up window. Made a post and within a couple hours I had my answer and was up and running!
The price may seem silly at first but it's a small cost for the ease of logging in via Facebook. One less password for your users to memorize! So go ahead and get this, there are plenty of Facebook components out there this will certainly be my last! You've made a satisfied customer.