+1...
While preparing for overseas travel I tried to do research on foreign car rental agencies and there is a real shortage of information. TripAdvisor didn't have much, and info on SIXT was random and inconclusive. So yes, it would be helpful--though I don't know how much in terms of loyalty rewards/points/FT importance.
BTW I'm not new here, just logged in with FB so it's starting me over from scratch....post #1