Just wanted to share our experience with Dollar/Thrifty car rental in Israel/Tel Aviv. We booked a Ford Fiesta for 10 days in July 2013, but we actually got a banged up old Mazda 2 with 75000km on it. The car proved reliable enough but it shook badly at 110kph - I originally suspected wheel balancing issues but it goes away if you are accelerating - so I'm guessing it could be a transmission issue. Worrying, but it keeps you below the speed limits which is a good thing! The car really was not fit for rental in my opinion.
Beyond that, the expensive GPS that we rented from them packed up after two days. First the dodgy cable finally broke and we couldn't charge it without manipulating the wires to make contact, then it plain wouldn't switch on. Luckily we had a paper map so we resorted to using that instead of GPS. So they rent you crap, badly maintained equipment at a very healthy margin.
Finally, their service is rude and aggressive. We collected the car from the most impolite staff I've ever encountered at a car rental agency in my life. To their credit, they did help us find our car when it got towed in tel aviv (we parked in a forbidden zone accidentally), but not before they said "it's your responsibility, you get the car back" and refused to help. After much protesting that every number I called was auto-answered in Hebrew, which I can't understand, they agreed to help and indeed located the car.
Summing up, I wouldn't use Thrifty Israel ever again and advise fellow travellers to exercise caution when considering their services.Edited: 11:34 am, July 20, 2013