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Yes definitely give your self lots of time as the other person said. I arrived with an hour and a half to catch my plane and missed my check in time and my flight. Waiting and waiting for stragglers to arrive. It is rather obvious that they do not think of individual needs before the parking lot needs. But they do not charge as much as others so that is where they get you if you are on a tight budget. I would try them one more time but would have to arrive a lot earlier. Not convenient for someone such as myself who does not live in Calgary. On a happier note the shuttle driver was very friendly and helpful .
Generally excellent, but allow at least a half-hour from the time you enter to get to the airport. From entry to airport usually takes ten or fifteen minutes, but I have had two occasions in the past year when the shuttle was very slow coming and then a number of us sat on the shuttle while the driver waited for stragglers -- even though we informed the driver that we had planes to catch. My time yesterday afternoon from parking in my designated row to the curb at Westjet was 33 minutes. I was within two minutes of missing the bag check deadline. Be warned: if time is tight, go elsewhere.