I have used YES services several times over the last few years to assist me with my immigration process in Mexico, and highly recommend them for their efficient and friendly service. They are very well organized and informed, and understand the immigration requirements very well. They clearly explain what is needed, and handle everything, meaning that I only have to make one brief visit to the immigration office myself. Of course it is cheaper to do everything yourself, however since YES services are not expensive, I believe they offer excellent value for money, since they know exactly what is needed, and by using their services, you avoid wasting time and potentially money by getting things wrong. Additionally since they make sure everything is perfect before the applications are submitted, it makes the whole process very smooth. I would have no hesitation recommending YES to anyone who needs assistance with immigration processes in Merida, or any of the other services that they offer.