I like that they are very responsive to feedback from our team as well! They have been able build out multiple iterations of prototypes for us in order help guide decisions along way when developing new features or products within their platform (iPill). There is nothing we dislike about them so far; however there may be something you don't know yet which might make it difficult if not impossible but otherwise everything has gone smoothly thusfar :) We're currently working through some finalizing touches before launching into production phase where more complex integrations will take place between other systems/platforms such as Salesforce etc.,.