We rented a car from here a couple of weeks ago. After reading the reviews,we were a little hesitant and tried Europecar first, but after 5 mins of speaking with one of their reps,we walked out of there, disgusted by the level of unprofessionalism. We then went to Sixt, and quite frankly were amazed by the bad reviews, as they couldn't have been further from the truth. We spoke with the manager, and right from the start built an instant rapport with him. He was very friendly and accommodating. Our needs were met, even exceeded, got exactly the car we wanted, it looked brand new. Everything was explained to us clearly and they even had a satnav delivered to us from another branch as one was not available in-house at the time of our booking. There were no hidden charges, and their service was exceptional,we couldnt have been happier. Regarding the 'unfriendly/rude' reviews' I guess the saying 'treat others as you wish to be treated!' applies here. Highly recommend Sixt in portoroz 5* service