NSPro 1.8 installed without any problems on my Joomla 2.5 website. The management interface is professional, well documented, and very easy to follow. I was able to create my email group, then my newsletter, and sent it to the group on schedule. I needed some customizations and Christopher was answering my email in just minutes. Christopher was a pleasure to work with and spent extra time with me to work out the solution. I will award five stars for the NSPro extension, and an additional five stars, for Christopher's support that comes with NSPro.