I was planning to use it on a large Joomla 2.5.4 news and information site that has a large membership base. Installing the plugin was very simple. I am reasonable familiar with Joomla. However after purchasing and installing the system plugin, I ran into difficulties. The accept/decline box would not appear on the site even though I had cleared all cookies and approached the loading of the site from the perspective of a first time visitor. I used the software authors support service to find a solution to my problem. To their credit they did offer me support & help in trying to resolve my problem. They made a claim that the fault was a JQuery conflict from another installed module and advised me what to do. Their solution was too complex for me personally to put into practice. They did visit my site and personally verified that it did work. SO full marks for the level of support. For a short period of time, I indeed verified on various systems that it worked but for some unexplained reason the plugin ceased to work and I emphasise that no changes to my site or any configurations caused this to occur. It simply stopped working!! Frustrating...!! So I asked a software technical colleague to look over the plugin and he reported back that he cannot understand himself how or why it works. So my honest constructive opinion here is that you should exercise caution before purchasing, downloading and installing this plugin. I suggest that you browse the authors website and try to determine if the plugin will actually work on your site. They do offer some advice regarding this. Several people have reported on the authors site that they have had some difficulties with the plugin and I am simply adding my bit to this. I have disabled and removed the plugin. I can only give this plugin an average rating mostly refelcting the quality of their support versus the ease of the plugins functionality. It might work on your site, but then again, depending on other plugins/modules etc., that make up your Joomla website - it might not!
Thanks for taking the time to share your opinion.