The taxi stand is to the left after you walk outside. I flew into SDQ last Wednesday and that's what I used. No issues at all. I avoided all the guys yelling taxi and went right to the stand. The gentleman there assigned a driver and told me $30. I reiterated to the driver that it'll be $30 US and we were on our way.
Conversely, I took an Uber back to the airport for my return flight. I needed it at 4:30AM on a Saturday morning and had no issues. The driver was prompt and courteous and got me to the airport in about 23 mins. It only cost around $20 US.