The CBX makes it easy to cross the border. You buy the pass/ticket online. In the TJ airport at baggage claim, after you have your bags, you proceed to the CBX ( Big Signs, Impossible to miss) and walk through the passage way to the US border, go through US immigration and Customs and you are out into the US side of the CBX. It’s like an airport terminal. Going back to Mexico is the same process and you walk across the border into Mex customs and immigration, then pass into the TJ airport. The easiest border crossing in the world.