I have worked with Fission for years now and I can say that they are always trying to improve their product line. They are committed to providing their clients with excellent customer service and support. This is one of the best companies I have had the pleasure of working with. There's nothing really, I don't dislike anything about them but maybe if they could make it easier to add new users to our account. We use the system as a way to keep track of our customers and also to help us run our marketing campaigns.