I park at the Chicago O’Hare facility. For the most part, it is convenient and their staff are almost always very pleasant to deal with. When they’re not, I’m willing to give them a pass as I see what my fellow travelers are like.
The reason for the 1 Star is simple. You HAVE to get your tech to work! I prepay my parking, often a month in advance. Approx 30% of the time, I have issues entering or leaving the facility and have to get assistance. Even though I have PreFlightAirportParking , my reservation often doesn’t come up so I have to always print up my confirmation, just in case. This is not acceptable. This is all you do!