We need a place to park at the Indy airport over spring break. Has anyone used Ace Rent-a-Car's parking lot? It's advertised at $35 for the week, but has mixed reviews on Yelp (www.yelp.com/biz/ace-rent-a-car-indianapolis) and here (airportparkingreservations.com/lot_ace_rent_…). I realize safety of the car is a relative term, but I'm more curious about experience with the shuttle, whether they make you leave your keys with them, etc. Thanks.