I paid an extra 30 euros for an upgrade and the car was excellent and good value for money

You did very well!

The customer service on picking up was excellent but unfortunately in less than 24 hours there was am emergency with our mom back home so had to fly back asap. I dropped the car at the level car park I picked up and the guy wasn't very helpful just kept telling me I had to take to 4th floor I tried to explain it was an emergency and we had a flight to get. Attitude wasn't very good at all

Car was totaly different from what I asked. The location of the car in the park was different from what they told me. Terrible.

There were a lot of hidden costs that we were not informed about upfront, including a mandatory €1000 deposit if we didn't pay out for the extra insurance cover, and a €102 fuel deposit (which is more fuel than will even fit in a Fiat 500). Staff also didn't tell us about these costs in one go, even when directly asked 'what is the total we will have to pay'. This created a really negative experience for us and impacted on a lot of our holiday plans. It seemed like this was intentional, a way of forcing people into paying money without giving them the full information in advance, and it felt like we were being scammed. It was also contrary to the information that we received from our broker, Easyrentcars.com, which advised that we could be charged a maximum deposit of up to the equivalent of $500, meaning that we were missold this car hire deal. In future I will avoid Interrent and recommend that others do also.

Like: The car I ended up renting was a completely different car from the one I rented and so my price ended up more than double of what I payed through the website ... that said, I fell in love with Fiat 500 convertible.. I found parking everywhere I needed it. And I loved driving in the mountains with the roof of!!
Dislike: The massive attempt to make me buy more insurance and I felt pressured into upgrading to a different car.