The product is good overall. very quick to install, configure and use. However, I have found one major issue with it, Facebook use the URL of the page the comments were submitted as part of their id. If you change the URL such as enable/disable SEF or your URL changes for some reason or other,you will loose all your comments and likes. Phoca support were notified about this and just said that this is the case as FB uses the URL to form their id and Phoca had no suggestions for a solution so it looks like I have now to stick with a non SEF or loose all the comments.
Hi, I think, this must be asked the Facebook developers, as this is a Facebook feature. :-(