Despite our many problems (see below), the staff were relatively friendly and helpful. (For example, the manager provided us with his personal cell number when we called to express our concern that the engine light had gone on and we were afraid of breaking down on a remote road somewhere.)
Our problems were many. Kayak linked us to carrentals.com which announced on their website that the rental price included the liability insurance required by the Mexican government. However, there was nothing mentioning this on the confirmation documents that we received and Economy Rentacar told us that we needed to buy our own policy @ $18 US per day. (They did lower it to about $16 per day after we complained.) They told us that the car we rented was a 2019 model but the registration said it was a 2015 and it looked and ran like it was even older. It had not been cleaned in a very long time and was filthy inside. It had dents, scratches and peeling paint on almost every square inch, really a piece of junk. We have rented cars all over the world and this was by far our worst experience. A bad mark for Kayak and car rentals.com as well, we felt ripped off from beginning to end.