After reading a few the recent reviews after my booking, I wasn't expecting a great experience however I was pleasantly surprised. When I arrived at the counter at Lisbon Airport, there was only a couple of people on line in front of me and it moved quickly. The young man I dealt with was very nice and had me all set with with my paperwork in less than 5 minutes. You then walk to the garage where they hand you the keys and walk you to your car. The car itself was relatively new and in very good condition. Dropping off couldn't been any easier. All the drops off are in the same garage and you just had to look for the lane designated for Sixt. A representative comes over, does an inspection of car, has you sign electronically, receipt is sent to your email and I was on my way. I visit Portugal and rent cars frequently. I've used multiple rental companies and Sixt is the best one up to now. Will definitely continue to use their services..