In the MIO stations is where you buy your rechargable card, or there you can wait for your MIO bus. There you can wait for an articulated bus, or for an padron bus.
There are many stations in cali, the principals are located at the center of cali. Each station is in a distance of 500 meters.
Also there are some stops in the streets to wait for the feeders, each one is by the distance of 250meters to 300meters.