The best thing about hey day is its ability to connect us easily through chatbot. It has helped me in solving my customers problems very well by just talking over voice or text messages. I can say it's one stop shop solution if you are looking at building conversational bot from scratch then this will be perfect choice as they have all major technologies like ReactJS, Nodejs etc integrated into their stack which makes development process quite easy. They also provide training material so there won't be any learning curve while using them. If you want something simple but powerful tool than go ahead otherwise i would not recommend because of pricing structure. As we were working closely together during our onboarding phase where we had many questions related to technical aspects such as node js integration, react js framework etc along with other things they guided us perfectly without asking anything extra out of pocket. We used their expertise to build up our own customised product within few months.