I've hired cars in Spain and Italy through Europcar... never had any issues or ripoffs.
I am still fighting with Europcar Italy after having a car last summer. Went out to the car one morning towards the end of the holiday to find the windscreen had cracked during the night. From what I can gather it was a much cooler night than the area had had for some months and I think the stone chip that caused the crack was pre-existing as IME stone chips to a windscreen usually sound like you have been shot and result in me anxiously staring at the windscreen for the next few days and I never heard one while we had the car. Anyway, this is irrelevant as I accept the crack occurred while the car was in my possession.
On returning the car we had to wait in a horrendously slow moving queue to check it back in and on getting to the front the attendant simply took our keys and popped them in the quick drop slot and said good day before turning to serve the next customer. A few days later a debit of around £190 sterling was taken from the credit card. This stung a bit but hey-ho, it was a good holiday which would have been seriously compromised if we hadn't had the car.
A few months later an invoice of 290Eu for a replacement windscreen dropped through the letterbox. WTF! There was no contact phone number on it, only bank details to make payment and an email address to send confirmation once payment was made. I sent emails querying the invoice but they never replied and eventually instructed a debt recovery firm in Southern Ireland to chase the 'debt'. The Debt firm are obviously a bit uncooperative as they have heard it all before but I still don't have any contact details for Europcar Italy. The Uk arm have given me a customer services number for the Italian operation but this goes to an answer phone and despite leaving messages I have also had no reply from this.....
DON'T trust any of them. If a big firm like Europcar can behave like this then any of them can and will stiff you at the first opportunity.