Long story short; I would not ever recommend SIXT to anyone. I read the reviews online before making the decision to go with the lesser-known car rental company for my trip to CO. Most of the reviews were saying things such as not getting the car you picked, being downgraded without a discount, and the worst, trying to communicate with a human is impossible due to their automated system which is not helpful. Regardless of all of this, I decided to go with SIXT and give them an honest chance. That was a mistake. My first issue with the company is its software systems and operations as a whole. I booked a Jeep Grand Cherokee at the beginning of April, while I won't disclose amounts, I will say it was not a small purchase. I knew there was an opportunity that I wouldn't be put in a Jeep Grand Cherokee and that was confirmed 2 days prior to my trip to CO when they downgraded me to a Chevy Blazer which I was fine with if it was the car they were to put me in. However, upon arriving in CO and selecting the exact make and model of the rental, both a Jeep Grand Cherokee or a Chevy Blazer were available and they tried to get me to go with a Toyota Highlander. I voiced my displeasure with the agent at which he kept saying it was the same as Hertz and Avis. The altercation with the agent led to him declining to service me. After he declined our service for which I had prepaid a month in advance, I did go to Hertz where they were able to put me in a Jeep Grand Cherokee. There are a couple of things that really bug me regarding this situation. 1.) The agent claims you don't get the car you requested on the app to due availability (first come first serve)... I booked this rental a month ago, is that not a priority? 2.) If you aren't able to put a customer in their requested rental, communicate that with them, and if you aren't able to put them in that replacement car, COMMUNICATE THAT TO THEM! Especially because the customer is probably traveling and it would be helpful. I was duped two times by this company, saying they were going to put me in these cars and they straight up lied. Never. Ever will I recommend this company to ANYONE. To add insult to injury, they called the day after, unknowing that they didn't lend me a vehicle and the lady on the phone didn't even want to hear my story. At this point, I truly don't know what to do