The National Council for Science and Technology (CONACYT) is the main founding institution for Mexican research activities. In 2017 Mexico, through CONACYT, became the first country enacting an Open Science Policy. Even when it can be considered as a remarkable milestone, there are many other challenges to tackle. This presentation shares part of the experience designing and implementing this mentioned policy, and what is considered the main elements to take into account like technical barriers, user's experience, incentives, among others.