Activa Congresos's support for the organization of the ACM-SIAM Symposium on Discrete Algorithms (SODA 2017) was key for the success of the conference. I want to underscore their high level of professionalism, their solid experience in the organization of all kinds of events, and their close cooperation and constant support to the customer. All our participants were delighted with the event, and I wouldn't hesitate for a moment to ask for their services to organize a new conference of similar volume of participation. I wholeheartedly recommend Activa Congresos to anyone willing to organize a conference in Barcelona or its surroundings. On a personal level, it was a pleasure to work with Olga and Yolanda.
Conrado Martinez / Chair of the Organizing Committee of the 28th ACM-SIAM Symposium on Discrete Algorithms (SODA 2017)