We are working through happycenter to create an app using Ionic3 that is designed around our client's service (transportation). This project has been managed very efficiently by Alex who always listens carefully what he needs from us as well how much time it will take until everything gets done! He was able also manage all dependencies between his team members which helped me feel confident about this process without feeling like i am only one person but more than 1 people doing things at once :) There isn't anything negative so far when dealing together wit him or any other member within their organization! The team, the passion, the quality of the service. The fact that for every project we are always consulted and updated. They are always open to suggestions and adapt to the needs of the project. I have nothing to complain. The only thing I can mention is that they are very expensive. I recommend them to everyone. They are really good and they are excellent at what they do. We have used them for a wide range of projects. They have been able to adapt to our needs and to our budget.