Similarly to others here I had a nightmare and would always go direct in future!! I pre-paid. My flight was delayed - contacted them asking for contact details for SIXT so I could let them know and they don't have any!! SIXT closed before we got there so I forked out for a hotel - went back the next day and picked up the car - BUT no record of my payment. I had to pay again and seek money back from rentalcars. This i do and lo and behold they say i need to claim in from SIXT because..get this...I breached the contract because I picked the car up a day late (delayed flight, and SIXT office closed before we got there I.e. out of my control AND I notified them both)!!!! So now they pass the problem back to SIXT who are trying to fob me off with a voucher!!!! Needless to say I do not intend to use either company again. Go direct- having a middle man just complicates everything and doesn't benefit the customer!!!!