I like that they have an easy to use interface, which makes it very simple for me as well my clients who are not tech savvy at all! The customer service is amazing too - always willing help you out with any questions or concerns!! They also offer great rates if your budget allows (which ours does!). There really isn't anything bad about this program in our opinion; however we do recommend trying other programs first before making final decisions because there can be better ones available depending upon what exactly fits into each person's needs/budget best of luck :) We used them mainly so people could easily send mass emails without having access themselves but now some members actually want us sending their email addresses via cacti instead since its easier than managing things ourselves when someone wants something sent right away haha :).