We used ISIS before Margarita passed as well, and never had any problems. But then, the last time we rented from them in 2022 my wife took the car back while I was diving. The guys there dinged her for a tail light that fell off and was hanging by a wire. This was one of those "million mile" convertible VW bugs. I feel pretty sure, if I had been there, they would never have said anything. If they had, I would have told them they were loco if they wanted me to give them some money for that tail light. But my wife is much less confrontational, and a much kinder spirit.
They may be fine now, but they will never get my business again.
And, on another note, I made a new friend with a taxi, who took us to the East side and babysat us for 4-5 hours. We had a blast, and we had our designated driver. He was great, and was ~ $30 cheaper than any other quote I have received. Of course we tipped him accordingly so it all turned out the same. PM me if you want his name & number.