Used several, always end up back with Cholo. On our trip in Dec uor Tropic flight arrived after they closed so they left the cart and keys at the treminal. Later, the lights went out, stopped in, had a new cart in about 90 seconds, literally. When we left on Sunday they said just leave it at the airport, keys with Tropic and we will pick it up.
I dont know if this is typical service but it has been similar the other 6 or 7 times I used them....